The link show you your own wishlist; the link doesn't work.

your wishlist link doesn't work but keep in mind you need to run 120+ constant fps if you're getting a 120hz monitor, I doubt you're gonna pull that with an i3

fixed link bros

I have the MSI z77a-G41, it's shit at overclocking, I can get up to about 4-4.2 ghz barely

other than that it looks good
actually this build is identical to the one I have

Even though you don't want to change the case, here are some options you should consider because you'll save a good chunk and they are decent cases.

http://www.newegg.ca/Product/Product.aspx?Item=N82E16811147060
http://www.newegg.ca/Product/Product.aspx?Item=N82E16811119256
http://www.newegg.ca/Product/Product.aspx?Item=N82E16811815014
http://www.newegg.ca/Product/Product.aspx?Item=N82E16811124151
http://www.newegg.ca/Product/Product.aspx?Item=N82E16811133094

You can't overclock a Core i3 processors. Their multiplier is locked. You can overclock the bus a very small amount, but it's not recommended and you'd only get at most a couple hundred MHz. The reason you would want to get a Core i3 processor now is that, at stock, they do compare to AMD quad core processors in performance but you have the option of upgrading to a superior i5 or i7 processor later.

If you go with an AMD processor they do require a better power supply when overclocked. They'll use up to, and sometimes greater than, 100W more than an Intel chip when overclocked. So with the video card you chose, you need a name brand 400W power supply minimum. A no-name 4-500W won't cut it for overclocking.

Now with that said, you can shave off a few bucks from your original build and just get the cheaper Core i5 3450. It has a limited multiplier to allow some overclocking, but its performance is still very good at stock to get you smooth framerates in TF2. And FYI don't forget to look at combo deals. The 3450 has discounts when bundled with certain motherboards and there are a couple of cheap alternatives that you might be interested in:

http://www.newegg.ca/Product/ProductCombos.aspx?Item=N82E16819116506&SubCategory=343&fromcs=0&bcmTag=0&SortField=0&PageSize=100&Page=1

If you can't get an i5, your next best option would be the AMD FX-6300 (Vishera). And if you can't afford that then get the AMD Phenom 965.

Since you plan to overclock with the AMD chip you will most likely end up spending a bit more for a robust motherboard. Once you find a motherboard you like, cross reference it with this list to make sure it'll handle overclocking. I'd recommend either of these for your budget:
http://www.newegg.ca/Product/Product.aspx?Item=N82E16813131873
http://www.newegg.ca/Product/Product.aspx?Item=N82E16813128519

Lastly you should swap out that RAM for a different model. Those heatspreaders on it are big and could potentially interfere with an aftermarket CPU cooler - depending on what heatsink you choose to get. Corsair offers alternatives.

If you want to get a Core i5, for under $500, you'll have to basically change everything, including the case, and get a much weaker video card.. If you are willing to swap out the case and keep the 650 Ti, you can build an AMD (or Core i3) system for just under $500.

tyyy copper for the reply lol. Ive decided im not gonna downgrade the processor, since this computer is prob gonna last me for a long time, i would probably upgrade to the 2500k anyways. I changed the case to something cheaper but still good like you said, please take a look at the new wishlist.

Can u recommend a better but cheaper MOBO, i was thinking of changing the RAM but most of the ram are about the same price (link me one if u find a good deal)..., also recommend me a cheap but effective heatsink since im gonnna OC.

I have a 700w PSU from my old computer, is that enough to handle this build? and can you make sure everything is compatible with eachother here.

Your power supply should be fine. With a Core i5 processor and GTX 650 Ti the system will only need about 300-350W, factoring in overclocking.

Everything in your wishlist is compatible, but go with this Corsair memory

I still highly recommend one of the cases I recommended. The Xclio case is nice, but it doesn't come with any fans (as a cost cutting measure). So if you need fans you're going to spend an extra $10-15, plus the shipping cost is higher.

ZALMAN CNPS5X Performa
Cooler Master Hyper 212 Plus

Those are a couple of heatsink options.

Trying to find a better and cheaper motherboard will be difficult. If you take advantage of this combo deal, you can get the i5 3570K and the MSI G45 board for less than the 2500K and G41 board:
http://www.newegg.ca/Product/ComboDealDetails.aspx?ItemList=Combo.1177083

Do what copperside suggested w/mobo/cpu- 30$
Ditch the evo junk - 35$

get this ram instead
http://www.newegg.ca/Product/Product.aspx?Item=N82E16820148517
-20$

650ti is weak
http://www.newegg.ca/Product/Product.aspx?Item=N82E16814161396

still saved 65$

I would recommend buying your cpu from a local micro center you can find a i5 for $150.

http://www.microcenter.com/product/400664/Core_i5_3470_32GHz_LGA_1155_Boxed_Processor

Also I would recommend stepping up to a 2GB 650ti, I have a 42 inch with a 1920x1080 rez and I am able to keep 120 fps constant with tf2.

http://www.microcenter.com/product/402813/02G-P4-3653-KR_NVIDIA_Geforce_GTX_650_Ti_Superclocked_2048MB_GDDR5_PCIe_30_x16_Video_Card

Mines was about your price range so this should help you out glhf

I would recommend buying a good CPU, and PSU, and making sure the mobo you get ISNT MISSING ANYTHING YOU THINK YOU MIGHT NEED.

Everything else can be mix and matched at a later time; GPU isn't super important for tf2, cpu is #1 priority. You do need to make sure your PSU isn't shitty, don't buy an unreliable PSU brand cause it's $20 cheaper; it can destroy your other parts if it fails, and it will cost you $100+ dollars in power bills if it isn't efficient, anyways.

#1 CPU, you need an i5 or better, i3 is not a good investment at all.
#2 PSU
#3 MOBO
#4 everything else.