Ive been a pc user all my life. I "found' Mac computers after I got my iPod. I now want a 15 in. powerbook. I was just wondering though, for a college-bound student, what would be better, the 12 inch, the 15 inch, or the 17 inch? Mind you, I'll be setting off in 2 years, so I still have some time to decide, but still, which one do you think is right? Oh and how many gigs is sufficent? Thank you all.