Absolutely, only a 4K monitor with 99% Adobe RGB will let you experience Anime that way it was meant to be.
And if you don't make it out of the child kidnapping ring it's probably a win for tftv and the world as a whole.
So really it's win-win.

I'm not telling you how to live your life but I hope that 4.0 GHz are a WIP. If 4.0 is all you could get on a CPU that turbos to 3.9 you might want to try harder.

Reminder that we are talking about 4 and 2 respectively.
Reminder that being born on a plane doesn't make you an air nomad either.

Although this isn't even about jus sanguinis vs jus soli, this is about ethnicity. The classic "I'm not racist, but..." in the variation of "They're black, so they can't really be french."

You're using a laptop.

#1
Yes, just try it, takes literally 2 minutes to set it up and 1 minute of that is rebooting. Need to recalibrate colours a bit because it makes the VG248QE suck even more, but it's doable to get to at least the same level or better than it is uncalibrated without LB.
Screen tearing is unrelated to LB. Fps != refresh rate you get screen tearing.
The input lag is a technicality. While the frame changes (top to bottom) the backlight is turned of so you can't see the half finished frame. So technically you do see the new position of your crosshair 1-2 ms earlier without LB, but do you really believe that the information you get while there's a new frame above the crosshair and the old frame below the crosshair is all that critical and will be instantly recognized by your brain while the scanline is still moving?

#3
How did you measure the input lag?

https://i.imgur.com/Q6lnp0b.jpg

It's more about how much you think you'll need rather than just copying recommendations.
250GB + 1TB makes sense if you need ~1TB, it doesn't if you only need 400GB. Same if you think 2TB might not be enough.

This is TF2, so more than 4 cores won't help.
You're not going to overclock or use SLI/XFire so you don't need a mobo that supports those.

PCPartPicker part list / Price breakdown by merchant

CPU: Intel - Core i3-8350K 4GHz Quad-Core Processor (€179.00 @ Paradigit)
CPU Cooler: be quiet! - Pure Rock Slim 35.1 CFM CPU Cooler (€29.95 @ Bytes At Work)
Motherboard: ASRock - B360M Pro4 Micro ATX LGA1151 Motherboard (€93.95 @ Bytes At Work)
Memory: G.Skill - Ripjaws V Series 8GB (2 x 4GB) DDR4-2666 Memory (€96.95 @ Bytes At Work)
Storage: Crucial - MX500 250GB 2.5" Solid State Drive (€71.95 @ Bytes At Work)
Storage: Seagate - Barracuda 2TB 3.5" 7200RPM Internal Hard Drive (€66.90 @ Paradigit)
Video Card: Gigabyte - GeForce GTX 1060 3GB 3GB Windforce OC Video Card (€265.95 @ Bytes At Work)
Case: NZXT - S340 (Black) ATX Mid Tower Case (€64.95 @ Paradigit)
Power Supply: SeaSonic - FOCUS Gold 450W 80+ Gold Certified Semi-Modular ATX Power Supply (€69.95 @ Paradigit)
Total: €939.55
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2018-07-11 15:55 CEST+0200
Didn't change the GPU yet, like I said you could get away with much less for TF2.
Cheaper, case just as an example.
PCP is awful for PSUs outside of the US so could find something cheaper.

The 8350K is purely for the clockrate, even though this means you'll need a cooler (-K CPUs don't come with a stock cooler), but you could get a cheaper cooler if you wanted to.
Basically your upgrade options are the 8600 (~6% compared to the 8350K) and the 8700(K) (~15%), which are disproportionately more expensive.
Obviously if you went with an 8350K, 8600K or 8700K anyway you could get a Z370 mobo and overclock, but like I said it's only worth it if you're actually going to do it. You'd get maybe 3-5% with the faster RAM that Z370 allows, but the RAM would also cost a lot more.
Essentially the question is how much are you willing to spend for an extra 10 to 20%. 100€? 200€? 300€?

As downgrade the G5600 would actually be an option. If TF2's behaviour hasn't changed significantly since I benchmarked it, the G5600 would actually be faster than the i3-8100. On pcp Belgium it's 105€ for some reason, should be ~90€. About 90-92% of the 8350K's performance at literally half the price isn't too bad.

With the G5500 as a placeholder to get a more accurate price, a cheaper GPU and potentially a cheaper PSU you could get it down to 700€. https://be.pcpartpicker.com/list/sfF2r6

The main problem is I've got no idea what settings you want to use and I've got no idea what it takes these days to get 200+ fps in TF2, especially since the requirements for 6v6 are vastly different from HL/pubs.

Is pcp supposed to be set to UK?
No, the prices are not comparable. You're paying 20€ more for the CPU, 60-80€ for that cooler and another 80€ for a Z mobo. Read up on overclocking now and figure out whether or not you're going to do it. Do it or don't, there is no maybe.

Storage capacity requirements?

Other than that could also drop down a bit further on the GPU, since even one or two steps down from a 1060 is still massive overkill for TF2.

Cheaper case and PSU due to better/cheaper options and appropriate downsizing, since the whole build will become a whole lot cheaper.

#2965
https://ca.pcpartpicker.com/products/monitor/#H=120,240&sort=price&page=1
<300$ your options are:
Acer XFA240: cheapest, FreeSync, which doesn't matter to you and can't be used with a 1050 Ti.
MSI Optix G24C: curved VA panel = curved (not sure if that's a pro or a con for you), better colours, but slightly slower response time.
Acer GN246HL: FreeSync, bad colours/contrast so strictly worse than the Acer XFA240.
BenQ XL2411: Motion Blur Reduction Utility / Lightboost.
AOC G2460PF: FreeSync, don't think the image quality is better than the Acer XFA240 either.

So basically Acer XFA240 because it's cheap, MSI Optix G24C because it's curved and got better colours or BenQ XL2411 because it got Lightboost.

#2966
No, it does not. It does everything worse than cheaper monitors. It gets used at a lot of CSGO tournaments due to marketing handing them out for free.
http://www.teamfortress.tv/post/649893/good-144-hz-monitors

#2958
You asked for good and cheap, not cheapest.
They would be compatible, but it's not worth it.
The extra threads do nothing for TF2 and the 8700K doesn't overclock higher either.

#2959
400 MHz actually and only 200 MHz with 6 cores loaded. But yeah, if he doesn't oc the 8600K he's doing it wrong and if he does there won't be any difference.

#2961
Shouldn't be a problem.

#2962
860 Evo would be faster, smaller SSD (+HDD if you need >250/500GB) would be cheaper.
What that guy wrote about the PSU is bullshit btw. There is absolutely no way that he knows whether or not a new PSU with no reviews yet will be more reliable.
If you want modular: https://pcpartpicker.com/product/XxvZxr/evga-b3-450w-80-bronze-certified-fully-modular-atx-power-supply-220-b3-0450-v1
If you want modular and 80+ Gold: https://pcpartpicker.com/product/Qb8j4D/seasonic-focus-gold-450w-80-gold-certified-semi-modular-atx-power-supply-ssr-450fm or
https://pcpartpicker.com/product/KmgzK8/seasonic-focus-gold-550w-80-gold-certified-semi-modular-atx-power-supply-ssr-550fm
If you want 80+ Gold and overkill because it's on sale right now: https://pcpartpicker.com/product/dMM323/evga-supernova-g3-750w-80-gold-certified-fully-modular-atx-power-supply-220-g3-0750

https://pcpartpicker.com/product/QNX2FT/asrock-z370-extreme4-atx-lga1151-motherboard-z370-extreme4
https://pcpartpicker.com/product/DXCrxr/msi-z370-gaming-pro-carbon-atx-lga1151-motherboard-z370-gaming-pro-carbon
https://pcpartpicker.com/product/tmF48d/evga-z370-micro-atx-micro-atx-lga1151-motherboard-121-ks-e375-kr

Roughly equivalent so get the cheapest.
If all are expensive/not available where you live I can give you some other options.

#2953
What about just buying a mobo that isn't terrible and got 4 slots?

Like I said the P300 is almost the same (there is a tempered glass version) except much cheaper.

#2954
Depends on the CPU. You still shouldn't get the 7700K.

I'm going to be brutally honest: Both are shit.
-212 Evo.
-Generally aftermarket cooler for locked CPU.
-Z mobo for locked CPU.
-3 year old CPU
-even better, a 3 year old CPU (i3-6100) which is now sold for half the price (G5400)
-single channel RAM
-shitty SSD
-shitty PSU
-shitty, overpriced wifi adapter (does he really need that?)

On top of that spending one sixth of the budget for the pc itself on a case is not that great of an idea.

Non-shitty parts, dual channel RAM, better GPU and much better SSD would look like that.

PCPartPicker part list / Price breakdown by merchant

CPU: Intel - Pentium Gold G5400 3.7GHz Dual-Core Processor (£47.99 @ Aria PC)
Motherboard: Gigabyte - B360M DS3H Micro ATX LGA1151 Motherboard (£64.97 @ Ebuyer)
Memory: Team - Vulcan 8GB (2 x 4GB) DDR4-3000 Memory (£74.99 @ Overclockers.co.uk)
Storage: Crucial - MX500 250GB 2.5" Solid State Drive (£58.49 @ Amazon UK)
Storage: Seagate - BarraCuda 1TB 3.5" 7200RPM Internal Hard Drive (£32.39 @ Aria PC)
Video Card: Asus - GeForce GTX 1050 Ti 4GB Phoenix Video Card (£146.39 @ Aria PC)
Case: Phanteks - ECLIPSE P400 ATX Mid Tower Case (£59.99 @ Aria PC)
Power Supply: XFX - XT 500W 80+ Bronze Certified ATX Power Supply (£35.93 @ CCL Computers)
Operating System: Microsoft - Windows 10 Home OEM 64-bit (£99.99 @ Amazon UK)
Wireless Network Adapter: Asus - PCE-N10 PCI-Express x1 802.11b/g/n Wi-Fi Adapter (£8.99 @ Ebuyer)
Monitor: Asus - VS248HR 24.0" 1920x1080 60Hz Monitor (£115.44 @ More Computers)
Keyboard: Logitech - K120 Wired Standard Keyboard (£13.65 @ Amazon UK)
Total: £759.21
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2018-07-04 20:43 BST+0100

Haven't looked into the monitor and keyboard yet.
He should also think about the P300 instead of the P400S.
Depending on that he could get a better CPU and/or GPU.

Frequency only depends on the exact model, there are no generalizations.
Ignore iX completely. Only the number of cores/threads and frequency matters. Otherwise they are literally the same. Except for the x8xx and x9xx models everything within a generation (e.g. all 7xxx) also use the same architecture. On top of that for Intel generations 6 to 8 (soon 9) are also the same. That means there is no difference between a 4 core/ 4 thread i5-7400 and a 4 core/ 4 thread i3-8100. In fact they literally use the same chip.
Most games, especially TF2, don't run any faster on a CPU with more than 4 threads so only the clockrate matters. Graphically demanding games will obviously stress the GPU more than the CPU, so again a better CPU doesn't help beyond a certain point. And that point is surprisingly low.
https://www.techspot.com/review/1022-batman-arkham-knight-benchmarks/page2.html
https://www.techspot.com/review/1022-batman-arkham-knight-benchmarks/page7.html
1060 ~ 970 ~ 870 Ti
That means with anything faster than a Pentium G3258 (2 core/ 2 threads, 3.2 GHz) the GPU is the limiting factor. That means the i3-8100 (4c/4t, 3.6 GHz) is actually overkill in this scenario since as fast as an i5-4690K (4c/4t, 3.9 GHz boost, but an older architecture). It might even be worth considering dropping down to a Pentium Gold with 2c/4t, but a higher clockrate (G5400 and up) to save some money that could go towards a better GPU instead.

Cooler and thermal paste are included on non-K CPUs. I'm assuming you don't want to overclock.

https://fr.pcpartpicker.com/list/V7mCr6
Just roughtly how it'll look like.

None of this will be relevant by September because there will be new CPUs and new GPUs and RAM should be cheaper as well.
Could also omit the HDD if you're fine with just 500GB.