so besides speed, which is better imac g4 or powerbook g4? I got the 667 model about 3 months ago or a month before the combo drive, i have a bad memory on dates and stuff but i was pissed about the combo drive i wanted it on the pbg4 before it came out since ibook had it, but with other stuff, which is better? and when do you think that ibook will take over the curent powerbooks