So I'm planning to get the low-end 27" iMac and running my Dell 30" LCD on it as well as a 720p Projector from the 2 TB ports. Anandtech's review suggests that 512mb video memory is a bit paltry to run 3 screens (esp if 1 is a 30") and I'm a little worried. I'd consider myself a light gamer, but it's also my HTPC (hence the projector) so I need decent pixel-pushing power. The $1999 27" iMac has 1GB VRAM and the option to upgrade to 2GB. FPS frame-rates aren't a big deal, but smooth Exposé and HD video playback are important to me. The fact that they offer a 2GB option worries me a bit - if I understand this correctly, more VRAM isn't going to make games faster, just allow smoother playback on higher res screens... which is precisely what I'm after. I'm hesitant because I'm already pressing my budget. Any thoughts?