I've had my iBook for close to two and a half years. Its been a fantastic computer with no problems, but as I head off to college I've been thinking about my next machine. I was initially set on an iMac since I just love the iMac and can use my iBook when I need portability (and, knowing my study habits, that won't be too frequently). However, I think that some level of portability, no matter how often I use it, is important. Can I expect my iBook to survive at least another 2 years if I use it minimally? Thanks in advance.