So I've decided that as nice as the 27" is, I don't really need quad core; no pro apps or extreme gaming. I like the size of the 21.5" better anyway, and the screens on the ones at the apple store were sooo nice. What I'm torn between is graphics. Does anyone know where to find benchmark comparisions between the integrated Nvidia in the base model and the dedicated ATI in the next model? As I said, I won't be doing much gaming (I do that on my uMBP), but if there is a really huge disparity in performance, I'd rather spend extra $$ to get the ATI, especially with OpenCL on the horizon. Thanks in advance!