From what I have gathered, people seem to prefer the GeForce 6800 series over the ATI X800 series in Athlon 64 systems. Is there truth to that? If I go with the GeForce, does it matter which brand of card I get? Is there any difference, for example, between the 6800 GTs made by eVGA, Gainward, and XFX?Also, is it worth spending an extra fifty bucks to get the 6800 GT Golden Sample?