I have a dilemma. I'm gonna get a new iMac probably when the iPod promotion is running, but i'm not sure which one to go for. I thought i'd settled on the high end 21.5" one, but then decided that I wanted to go for the 27". My worry is that games and movies will not look as good on the base 27". For games it might not have the processing power and video card to run on high quality, and videos might look ugly being stretched out so much. Thoughts?