I say unless you're going for a more "professional" approach to video games (like if you're gonna start a clan and play in leagues or something) you should buy a rather cheap graphics card. I mean, you don't really have a reason to have edge graphics if you wanna play quake 4 for a total of 30 hours or something. But if you're going to play Unreal Tournament for 500 hours in leagues or something, and that's where you get the Fr.P.Sec problem, you would have to buy a better graphics card. Furthermore, for RPG games or games with bigger environments you'd be better off with 512 mb. But i would again go for the 256 since it will be a better buy for any usual F.Per.Sh. or somethin. I'd go for the 6800GT.