Hello All, I am planning to buy my FIRST Macbook Pro(13 or 15 inch). My primary use will be software development. Along with the development environment (IDE), I need to have one virtual machine running in the background most of the time. My current HP 17" laptop with Core 2 Duo (2 gigs of RAM) somehow just manages this task. I have to walk in the university and the 17" makes me suffer a lot. I need a powerful but portable laptop. I am very much confused between 13" with C2D and 15" with i5 Any suggestions?