I am driving myself crazy. I own a 1GHz G4 iMac, looking to upgrade this summer. Cannot decide between the two machines in the thread title. The former has portablilty going for it, but a hell of a price tag and a slower processor (and slower, smaller drive)...the latter is much faster (only 200 mhz faster, but FSB is blazing), larger faster HDD, and bigger screen, but no portability. Ima college student, so portability is key..... and I am a power user, so the G5 will definitely be noticed. How well of a performer is the 1.67 G4? How easy is it to detach the screen of the imac?? Help.....