Looks like Apple will be replacing my MBP (finally ), and I have decided to get a MB and 20" iMac in its place. While the iMac will be my Pro machine, I am wondering just how hard I can push a MacBook with Pro Apps. I would love to be able to run Motion and shake (though slowly) and I know FCP will run, so yeah... The MB will have 1.5 GBytes of RAM. Help?