http://pcpartpicker.com/p/17L4I
I wanted to go with something considerably better, but less money mo' problems so my friend suggested this. (you can take out the OS; my university offers a substantial discount).
Used for gaming, but I'm not sure how well it will perform on stuff like The Witcher 2 or new releases.
Feel free to suggest changes to the build, as long as they are focused on bang-for-buck and keeping the overall cost low. Also, I'd like to have room to upgrade later (as in a 7950 gpu or 8350 cpu).