I'm having a hard time deciding between the two. I am upgrading from a plastic 13" Macbook. I love the portability of the 13" notebook, and if I buy an iMac I can still use my current MB to travel with. I travel a lot with my MB though(lots of school time) so having my primary, most powerful computer with me at all times would be great. -to MBP owners, is the 13" MBP powerful enough and deserving of the "Pro" name -anybody with a 21.5" iMac + low end MB combo have any suggestions?