I am looking to buy a new computer and I really like Apples design and not having a tower at my feet. But I can see that Graphic cards are overlooked in Macs? Only the most expensive line - the best 27" comes with 1gig Vram and can be upgraded to 2gig. What about the 21,5"? I really dont want a large 27" screen, but will the better 21,5" not have serious problems running newer games in medium-high settings with 512gb Vram? And with an "old" but still good Graphic card. I mean the 6750 and 6770 are just new names for old 5750 and 5770 Radeon cards. http://www.anandtech.com/show/4296/amds-radeon-hd-6770-radeon-hd-6750-the-retail-radeon-5700-rebadge Any good opinions on if more Vram is not needed or can someone with a good knowledge on this subject say it wont be the bottleneck in gaming - at least not the for now?