I got my PB with an apple loan for students...this would have been the only way I would have been able to afford it. I got the computer, a zip drive, combo printer/scanner, and Virtual PC. I pay around 35 bucks a month...
I wish I would have been able to "save up"...but I'm in med school right now, so having a second job isn't exactly the easiest prospect. I also needed a computer now, and not a few years from now. It all depends on your situation...without the student loan I wouldn't have a computer now, bottom line for me.