I am starting to look for a replacement for my "old" 15" 2.33GHz Core 2 Duo MBP. I am considering going with a 13" MBP this time around. I've always had 15" models, but like the smaller, lighter aspect of the 13" model. When at my desk, I am plugged into a 17" monitor, so the smaller screen size shouldn't be a factor most of the time. I use the MBP monitor for toolbars, etc. and the 17" for the workspace. My concern is more about processor/speed. Am I making a lateral move going to a 13" 2.66GHz Core 2 Duo? Bus speed is higher (1066 vs. 667 now), but the rest of the specs look like a wash. I mostly use Illustrator and Photoshop with a little video editing thrown in. Video editing is slow for me now, but I do it so rarely, that it doesn't bother me too much. After reading all of the other posts about which model to choose, I am fairly confident that the 13" will do what I need, but since I am spending the money, it would be nice to see a performance boost. Thanks!