I'm curious of anyone who runs Motion 3 on any of these machines and how they perform (especially the ones that are maxed out/top of the line). I don't intend, at least for now, to get into really complex work, or alot of HD stuff. But some small projects and to get more experience. I keep going back and forth on what I want, but I think i have settled on a refurbished mbp 2.6ghz prev. generation. Money IS an issue, so a Mac Pro is out of the question. My current 17 inch Intel Core Duo imac is getting a little long in the tooth. At first I thought I could get a 3.06ghz iMac for the big stuff, and have a nice lil' white macbook for portable needs, but figured i could compromise the 2 things with a MBP (i dont think i want the new models just yet). Guess I just wanna hear any experiences with Motion 3 on any of these 3 machines. Thanks!