Going with the i5-3570k for overclocking
Z77 extreme4 asrock mobo
chrono 120gb ssd
g.skill 8gb ram
Need help filling in the blanks.
Really need help deciding on a video card. Was leaning towards the radeon 7850. My price range for video card is $200-320 it all depends on where i get most bang for buck. need help choosing mid-tower and power supply after that. may do SLI in a couple years but won't do it off the bat. Also looking for a case that has usb 3.0 and 2.0, cost effective.
I had been pretty down on the 7870 for the past few months because I didn't think it offered enough over the 7850 to be worth it. But there's a $270 post-rebate 7870 on Newegg now: http://www.newegg.com/Product/Product.aspx?Item=N82E168... The Twin Frozr has historically been a pretty decent cooler, too, so you can probably OC that thing quite a bit.
Unless you go up to ~$400 to get a 670, which would be a good choice, I think you have to go AMD. It just doesn't make sense to get a 570 (or a used 580 or something nutty); they're too hot and too little VRAM.
As for lower price options, you could also get a 7850 and anticipate getting a second one in the not too distant future. But I abide by the old axiom that you should get the best single card you can afford and save SLI/Crossfire as a future upgrade path. I think we agree on that, though.
The notable thing about the 7850 and 7950 is that, relative to the 7870 and 7970 (respectively), they differ more by clock speed than by silicon. But there is no reason you can't make up that clockspeed by overclocking. So the 7850 and 7950, once overclocked, are sort of better values than the 7870 and 7970. That isn't to say the 7870 isn't a good card, especially if it's pretty close in price to the 7850. But the jump to the 7950 becomes more dramatic once you factor in OCing. So if you can do it, I'd go to the 7950.