pls
ok fine jeez
pcpartpicker is pretty much your friend here, it was mine whenever i (almost) built my desktop
here's a pretty good build i found with $600, includes 7 home premium and a cheap keyboard:
http://pcpartpicker.com/p/132H9otherwise, just mess around with the options until you find something suitable
also, don't skimp out on your psu or case, you'll probably need to upgrade half of the parts by the end of this year's "next-gen revolution" in order to keep pace with all of these gtx titans going around