Hi - I am going to buy an MBP. I really want the 13" form factor since I will be lugging it about every day to customer meetings etc. However, I also want the fastest machine I can get as I will be plugging it in to a 24" widescreen monitor at home and hope to use the laptop for Adobe Premiere elements and Lightroom at home. I was disappointed to see that I can not spec a 500gb 7200rpm hd like i can with the 15" model. Anyone know why? Cheers, Dub.