I was wondering if there would be much of a speed improvement going from a 1.33GHz iBook G4, 768MB RAM and almost full 60GB hard drive to a MacBook Pro 2.0GHz, original 512MB RAM and 2GB ram, 160GB hard drive. I might be stuck with 512MB RAM at the start but I'll eventually get it to 2GB. Also if the MacBook Pros are updated to Core 2 Duos with everything else the same. I have photoshop CS(1).