Hey all, I am going to be a freshmen in college this coming fall and it has come time for me to buy a laptop for school. Right now I'm between two MBPs, the 13inch 2.9GHz MacBook Pro and the 15inch 2.3GHz Macbook Pro. My major is still undecided but I have a feeling I will be getting involved with cinematography as I enjoy the film industry. That being said, I know I am going to need a computer that can handle larger than the average size file. Which computer will be able to do this sufficiently without lag? I have a feeling that I will be upgrading the RAM on the 15inch to 8GB. Thanks for any input, I've tried searching. Additionally, how much more power does the 15inch offer over the 13 inch? I used to be extremely computer savvy but time has gotten away from me it seems and I am out of the loop.