I currently have the older model 15" MPB. It has a 2.16 Core 2 Duo and a 120 gb hd and I upgraded the RAM to 2 gigs. I have until the end of the month to purchase the applecare ($230 after student discount). Also, I have the student ADC which expires at the same time. I guess my main question is whether its worth it to upgrade to the 2.2 or 2.4 with my ADC discount taking into account I'd spend at least $200 for applecare to extend my current warranty protection? I'm not too sure how much I could get for my current model. Its in good cosmetic shape and runs really well. Maybe $1500? Throw in the ADC discount on the newer models and taking into account what the outlay would be for the applecare on my current model, what makes the most sense? Upgrade? Keep what I've got and let my one-time ADC discount go to waste? Any opinions are greatly appreciated! Thanks.