I can't really decide if its really worth the extra $300 to upgrade to a 2.93ghz? I wil lbe using this as a main desktop replacement machine. I will be taking it with me to work everyday. I am a graphic designer so I use mostly the adobe creative suite apps and also do some photography, and edit movies as a hobby on the side using iMovie. Will there be a big and noticeable difference on the 2.93ghz vs. the 2.66ghz? I'm guessing it will be better since the 17" has a higher resolution screen, which means more pixels it needs to process. 1920x1200 instead of 1440x900 compared to the 15" unibody mbp.