I'm heading off for college in the fall and I am unbelievably intrigued by the 15" Powerbook. I'm also considering the IBM Thinkpad T42 and Thinkpad R41. So tell me honestly. Is the 15" Powerbook the ULTIMATE college laptop? I'm not an art or graphics major, so I probably won't require those types of features. I'm more likely to be a business or biology major. Keep in mind that this would be my first Mac. Is this a good time to switch? Are there any disadvantages? Thanks for your help!