Hello - I'm thinking about buying a laptop, probably used/refurb powerbook (12" or 15") or iBook (12"). While I'd love a new MacBook, I think it's a little more than I want to spend, and I think the G4 models will suit my needs (web/email/iTunes/iPhoto/iWeb on the go or around the house) just fine. I'll be using my desktop for more heavy-duty work. Anyway, with a nod to portability, I was wondering if anyone can provide input on their battery life experience with the models listed above for the types of things I mentioned here? Any difference between the 12" PB & the 12" iBook? How about with the 15" PB? And one other question - I hear that iBooks getted better airport reception compared to PB's. But how bad is the PB reception in comparison? Thanks in advance for your input!