Yeah, by that time there will be new CPUs, new GPUs, new chipsets so nothing of the rough guideline would remain.
Not sure which Samsung 1TB M.2 SSD and which Corair 1TB M.2 SSD you mean because there's like 5 each.

https://skinflint.co.uk/?cat=mbam4&sort=p&xf=13067_USB+BIOS+Flashback+(extern)%7E317_B450%7E317_X470%7E4400_ATX
They're all fine in terms of VRMs so pick whichever you like most or based on other features, not that they differ much.
https://skinflint.co.uk/msi-b450-gaming-plus-7b86-002r-a1858940.html?hloc=uk
https://skinflint.co.uk/msi-b450-gaming-plus-max-7b86-016r-a2106596.html?hloc=uk
https://skinflint.co.uk/msi-b450-tomahawk-7c02-002r-a1858998.html?hloc=uk
https://skinflint.co.uk/msi-b450-tomahawk-max-7c02-020r-a2106584.html?hloc=uk

Not much to be done for the PSU I'm afraid. You could save 10-20£ by going for a semi- or even non-modular 80+ Bronze that ranks like 5 tiers lower, but it just doesn't seem worth it. So really it's between the the Focus Plus Gold and a G3.
https://skinflint.co.uk/evga-supernova-g3-550-550w-atx-220-g3-0550-y2-a1549684.html?hloc=uk
They're both very good, hard to say which one is better (better regulation on the Seasonic, but better +12V ripple supression on the G3 and so on) and although I'd lean towards the G3 in that regard I'd actually recommend the Seasonic. It's shorter and quieter at low loads, which unlike the difference between 12 and 25 mV ripple you might actually notice.

Still didn't check the RAM but I trust you to ctrl+f through a QVL once you've picked the mobo.

General outline (pcp being what it is outside the US prices are not that great):
PCPartPicker Part List

CPU: AMD Ryzen 7 3700X 3.6 GHz 8-Core Processor (£317.58 @ Aria PC)
CPU Cooler: CRYORIG H5 Ultimate 76 CFM CPU Cooler (£51.17 @ CCL Computers)
Motherboard: MSI B450-A PRO ATX AM4 Motherboard (£83.45 @ Ebuyer)
Memory: Corsair Vengeance LPX 16 GB (2 x 8 GB) DDR4-3200 Memory (£83.61 @ CCL Computers)
Case: NZXT H500 ATX Mid Tower Case (£64.98 @ Amazon UK)
Power Supply: SeaSonic FOCUS Plus Gold 550 W 80+ Gold Certified Fully Modular ATX Power Supply (£75.46 @ Amazon UK)
Total: £676.25
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2019-09-03 13:40 BST+0100

Not sure which decent coolers are reasonably priced in the UK right now but 50£ should be enough to give you some options. You can spend more money on that and the mobo if you want to. X570 prices still aren't great so I'd recommend B450/X470 with CPU-less BIOS update just to be safe.
PSU prices are always terrible so I'll have to search manually later.
Didn't check the RAM QVL either but since the mobo might still change I couldn't be bothered.

Yeah, but you still can't afford a better GPU so that'll have to wait. Not great for Destiny 2 but at least there's still plenty of time until Cyberpunk is released.

Overclocking yes/no?
Full ATX or µATX?

https://i.imgur.com/2OggKej.jpg

Ok, some more questions.
-Overclocking yes/no?
-completely new builds or will you be reusing HDDs/SSDs/whatever?
-do you want to spend 2-2.5k no matter or do you have a specific performance goal for minecraft/editing as well?

Well editing will benefit from the extra cores and you can afford it -> 3900X.
I might make a build later. If I don't just post in the pc build thread.

#3398
No, it's >650 which shouldn't qualify as "600-ish" since it's closer to 700. So if the prices don't drop enough (or not at all) until October you can force it down to 600.

#3399
Not really a build and cba to go search through 5 pages of pre-builts right now.

#3400
Should be fine if it's not complete garbage.

RGL hasn't exactly looked like competent or good league so far and it's not like sigafoo is holding all the teams hostage.

Now that's the actual reason, the prizepool.
Though I will never understand why people put up with this shit for prizes they will never win anyway.

FYI the GTX 1660 (Ti) use the same encoder as the rest of Turing (RTX), only the 1650 doesn't because of reasons.
A GPU upgrade just for streaming might not make much sense though if you were going for a CPU upgrade in general and just want it to handle streams well. If you're using an older nVidia or AMD card you might want to test how well your current card does before considering any upgrades.

Unless you care very deeply about the tasks where the 9900K performs slightly better (e.g. TF2 without streaming) a 3900X might make more sense. Similar for 9700K vs 3800X/3700X.

Also unless you desparately need the iGPU a 9900KF is cheaper and otherwise identical.

In an ideal world, if you're willing to overclock, something like this: https://uk.pcpartpicker.com/list/Jcf9q4
With a cheaper and/or used GPU, maybe dropping the HDD, 8 instead 16 GB RAM you could get this below 600 if it's not in October.

If you don't want to overclock: https://uk.pcpartpicker.com/list/YhMcZR
The 9100 non-F is so much more expensive than the 9100F (no cooler, no iGPU) that even with a 35£ cooler the F would still be cheaper. Any cooler will do so unless you think you really need that iGPU go with the F.
B360/H370 only support 2666 RAM, but it's really not worth buying a Z370/Z390 mobo just for faster RAM.

Case doesn't matter much, pick whatever you like, can afford and isn't complete garbage.

There's also the AMD option: https://uk.pcpartpicker.com/list/yzMcZR
3400G is also an option, slightly faster and SMT is nice for other things.
Overclocked it would still be slower than an overclocked 9350KF, but about on par with the 9100F.
So it's a bit of a niche/sidegrade, because if you don't want to oc it loses to the 9100F and if you do you can afford the 9350KF with a bit of fiddling.

Not sure what's worse
- no SSL on a site involving money
- admins either bypassing steam login
- or admins having access to steam login

Because this is the equivalent of "I ran into a wall, why does my head hurt?"

Honestly you deserve everything that happens to you.

https://en.wikipedia.org/wiki/Michael_Baden
At this point the conspiracy theories write themselves.