Man, I'm in a tug-of-war between 13" and 15" (undecided which low or high end model I should get). Extensively I'll be using it for writing and research (Office apps, Scrivener, internet, etc) and view videos. Also I'll be doing a bit of design, video and photography stuff with PS, Illustrator and other Adobe apps, and I don't game much. I know 15" is overkill based on my needs, but I can afford a high-end one and figure it could handle whatever developers come up to throw at it for the next five years, especially Mountain Lion and future upgrades, and it also has some value if I decide to sell it in 2-3 years for a new laptop. Still a part of me says forget it and get a 13" since it could handle my needs and save some money anyway--which in this direction I figure that I'll be buying a new laptop in 2-3 years. So, do you think I'll be crazy for getting a high-end 15" (or low-end 15"? and like I said that I can afford either one) or should I get a 13" instead (low or high end model?)?