i'm about to buy a ppc *book, and i'm curious about each of their portabilities. i'm looking at a 12" powerbook a 14" iBook and a 15" HR powerbook i'm going to be using it at campus everyday as well as a desktop (eventually). i just returned a macbook, and it was nice, yes, but it did seem a bit small, but definately useable as a desktop. i know the ibook will do, my good friend has one. how do the other two fare? is the 12" powerbook too small for a desktop? because it's defaintley portable. is the 15" powerbook too large for a portable? def good for desktop. any input will do. i'm looking to purchase one of the three within the next two days.