Hey, I'm in the market for an iMac. I really can't decide on whether to purchase the 20" or 24" model. I'm also a bit cautious about the graphics card. Are they able to play relatively new games (like 07-08 releases) and encode video at a fast pace? I'm also probably going to use Boot Camp and Vista with the iMac, and I would like at least a 5.0 rating on the Vista Experience Index. Would the 24" iMac refurb w/ ATI Radeon 2600 graphics and 256MB VRAM be sufficient to achieve this? I'm leaning towards the 24", but would like to know the difference of 20" vs. 24" size. Is it a lot? I currently run a MacBook hooked up to a 24" Samsung, and the desktop is very big... but I've grown used to it. So am I missing out on a lot if I go with the 20"? Thanks.