Get something along these lines (definitely go with Intel CPUs atm, they have the best deals, and offer the better performance):
CPU: Intel i5 2500k
Motherboard: ASUS P8P67 DELUXE
2x G.SKILL 4GB
2x Sapphire Radeon HD 6950
SSD: Intel 510 120Gb
HHD: Samsung 1TB F3 Spinpoint
DVD Drive: Samsung SH-S223C DVD+RW Drive
Case: CM HAF 912
Cooler: Corsair H70
And buy a GOOD monitor - at least 1080p - with whatever you have left.
This rig can pretty much play any game released maxed at 1080p resolution.
If you want to spend more - I wouldn't see why - but you can get the i7 2600k (no gaming advantage, but better encoding and multi-threaded performance) or a third Radeon 6950 or BD combo drive if you watch Blu-Rays, or another case to your taste, you could also buy some extra case fans, etc...Edited by born2bwild - 5/6/11 at 4:48pm