700-800$ Gaming PC

Im looking to build a PC that will play Call of Duty World at War, Team Fortress 2, Planetside 2, and Battlefield 4 when it comes out. I can overclock ONLY if instructions for this are given with the build post. I also live near a microcenter. Mouse, Keyboard, and Moniter nned not be included in the build.

EDIT: If possible, I would also like to run 2 moniters, so prefferably a graphics card that supports that.