i'm buying a amd x2 4200, a8ne SLI premium, 1 gb ddr400 ram(in a mth or 2 will be upgraded to 2gb), 250gb western digital hdd. i wanted to know if it is better to go for 6800XT 512mb sli or 7900GT 256mb sli. i'm planning to use this comp for maya(3d application) and gaming of course. i was going to buy a quadro fx card, but then its only the high end cards that support pixel shader 3 and i can't afford that. which one should i go for?