I'm considering purchasing a Mac Pro in a month or two, and I apologize if these are frequent questions (no idea how to phrase my search! )... but I'd appreciate the feedback. First off, what's turning me away from the iMacs and Macbooks of the world is the lack of expandability... but can the processor and such be replaced with newer Intel processors/motherboards if things get to be a bit outdated? I'm well aware about Macs and their lack of upgradability as it is, but I was wondering with the switch to Intel if this had changed any? Secondly, what's everyone's experiences with refurbished Mac Pros? Getting one would save me a great deal of money, and would allow myself to get an even faster desktop for less. Can I buy Applecare for it, in case it fails somewhere along the line, and I have to take it in?