I have a question...why is it that most people on this board say it's a foregone conclusion that you should get a 15" over a 13" MBP? I am honestly asking the question because I don't know the answer. Let's put it this way, if you are a moderate user of the computer and the heaviest piece of software you are running is Aperture or Lightroom, is the 15" really $600 better than the 13"? Also, this is going to be a computer that my family will be allowed to use as well. That being said, should I get the MBP or an iMac. As for portability, it is more of a luxury than necessity, but I like the option of being able to take it with me if need be. It boils down to this, am I giving up too much by going with an MBP just for the "option" of portability? I know these are somewhat broad questions, but I would like to hear some of experienced users pros and cons of these options.