here is a question

I am looking at the EVGA 8800GT for my new rig the specs of the rig are
as followed:

gigabyte Ga-57sli-s4/amd athlon x2-5400/80gig harddrive (for OS)/dual
500gigers/2gigs pc6400 gskill ram/vista/ rosewill 500walt SATA PSU

What i was wondering is it worth spending the money on the 512 version
or is the 256 just as nice... i need direct x10 so i can play the
following:
unreal tournment , medal of honor, fear, company of heroes, call of
duty 4, and any games to come.........



Multiple system for multiple purposes!!