This was a budget build I put together a couple years ago, still runs everything fine (just mostly without shadows for things like WoW, Skyrim and GTA4). Once I get money I plan on doing upgrades to the RAM, video card, and processor. If I've got enough cash left over, I hope on getting a couple SSDs to replace my shitty old SATA.
Specs:
AMD Athlon II x4 2.8GHz
4GB Kingston @ 1033Mhz (I think)
500GB Seagate 7200RPM
Nvidia GeForce 240 GT
Also: being nearsighted has its pluses: I don't need anti-aliasing because my eyes have it built in. seriously, i see no difference unless i get uncomfortably close to the screen