I'm still undecided on whether to get the 21.5 inch or the monster 27 inch imac. Due to the size and the type of useage, I'm leaning to the high-end 21.5 imac. I've been trying to find info on 4670 performance and where it sits in the gfx card hierarchy and found this info. http://www.anandtech.com/video/showdoc.aspx?i=3405&p=1 Granted that this review is for the desktop version while the new 21.5 inch imac I believe has the mobility version. Interesting nonetheless. But frustrated that Apple has to make this decision this difficult. Notice that the review is from Sept/08. Why would Apple use a gpu for the 2008 bargain segment as the upgrade option on the high-end 21.5inch model. Damn you Apple!!!