Making the switch to Mac. I'm not a gamer, so I just need something to handle my modest post-processing needs. The mini with a 23" Cinema Display is about the same price as the 20" iMac. I know the spec advantage goes to the iMac, the screen advantage I'm guessing goes to the Cinema Display, especially with the matte/glossy debate on the iMac. So, for you Mac enthusiasts out there, which would you pick, and why?