i5 2500k - $200
P8Z68-v Pro - $200
8GB 1600MHz Ripjaws - $50
Samsung F3 1TB = $60
2GB Radeon 6950 - $250
SS M12II 520W - $100
Lian-Li PC-K7B - $90
Crucial M4 64GB SSD - $100
Comes in at ~$1050 which leaves room for OS, monitor, speakers, keyboard mouse, if necessary. For my reasoning:
I went with the 2500k since it's basically the best choice right now. Bulldozer is rumored to be releasing next week, and AMD has finally started hyping purchases for it again which gives it more credence. If you want to wait, I think it will only be beneficial to negligible. If Bulldozer performs well it could drop prices on the 2500k or be the better purchase, if it doesn't then you can just get the 2500k for the same price as now.
For the mobo, I honestly just picked a random Z68 mobo, someone else should give you better ideas.
8GB of RAM is more than you need right now, but it's so cheap there's no reason not to.
Samsung F3 is quick enough to be a main drive. If you need more storage, feel free to add more storage.
I went with the 6950 over the 560Ti only because of the VRAM. It's becoming more of a bottleneck now as new games like BF3 are straining that more and more. If you don't need the extras I didn't price out, feel free to upgrade to 1.5GB 570 or 2GB 6970.
I picked that PSU because it was the only decent modular unit close to the rig's power draw. If you're ever considering to upgrade to SLI/CF you would need a larger unit at around 650-750W. Easily attainable if you don't need OS etc.
I picked the PC-K7B because it's an aluminum case under $100 with cable management. Nothing will ever be as good.
The 64GB SSD is for your OS and a few extra games. It is not going to increase your FPS but it is the single most noticeable upgrade anybody can put into a modern rig right now.