If you can grab the $250 desktop deal at the AMD Tech Tour, that gives you an AMD64 3200+ CPU, Asus A8N-E mobo, and WinX64 Pro.
Then you get the $250 X800XL PCI-E video card from Monarch.
mid to upper-range gaming system for budget price.
edit: sorry, forgot links.
http://amd.com/techtour/ (click on Desktop bundle)
http://www.monarchcomputer.com/Merchant...ct_Code=190527&Category_Code=ATI-PCI-E
edit: crap, forgot to include ram in the price...
um, the Corsair Value Select linked above is only 80 bucks, so that's not a bad idea...
meh, at least you have the options.