I am considering the purchase of a new MacBook Pro and am trying to decide whether the additional expense of the high-end model is justified. This is to upgrade from my 1.25 GHz PowerBook G4 which has served me very well for the last few years. The use that seems to challenge my current notebook the most is editing large Word files containing graphics, and starting and editing in Photoshop. In addition it gets quite hot sometimes. It seems to me that the only significant hardware difference in the new MBPs that might make a difference are: 3 MB vs 6 MB L2 cache, 2 MB vs 4 MB SDRAM, and 256 MB vs 512 MB GDDR3. Any advice will be much appreciated.