I'm a long time Mac user currently looking to make the switch at home. At first I was looking at the iMacs and eagerly awaiting the latest update. I was considering the top of the line iMac and then I realized that the price was pretty close to the base model Mac Pro with one processor. I have a nice monitor and a few SATA hard drives laying around so it makes a lot of sense. I will mostly be using the system for character animation in Maya, some Mental Ray rendering, video editing (mostly compiling TIFF sequences), and Photoshop. My question is: How much of a difference is there in processor performance between the high end iMac, the single processor Pro, and the 2 processor Pro? the single processor Pro is about as much as I can spend, but would I be dumb for getting it?