I'm considering buying a current MacBook 2.2GHz vs. current MBP 2.4 GHz. I know there are other hardware differences besides processor speed to consider as well. Smaller screen with MB, less room for pallets, etc. This will NOT be my primary image editing machine by any means, just for occasional Photoshop use.... and mostly used for internet use where speed isn't important. The cost of the MBP is really quite a bit more than I really want to spend... so I'm curious how much of a speed loss I would notice in using Photoshop on a MB vs. the MBP. Assume both machines loaded with 4 GB RAM. I tried to find some speed test comparisons (can anyone direct me to some?), but haven't been able to find any... Your thoughts?