I saw the graphic on Apples website obviously but the 3DMark06 from another website had the GT130 only like 8% better?? Why the difference in the stats from Apple and the 3Dmark06? Does the 256 vs 512 graphics memory really matter much? I play mainly WoW and iRacing, but may move to newer MMRPGs, and don't want to spend the extra $300 if it's worthless.