I was looking to get a G5 tower for my video work (FCP, After Effects, PS). But now it seems I may need a portable. Will a PB be fast enough for these apps that I won't curse myself for not getting a tower? I don't need the fastest computer, but I am used to working on a DP 1.0 mac, and don't want to slow down too much. Thanks. Also, will I notice much of a speed difference between a 1.0 Ghz G4 and a 1.25 Ghz G4?