i see at least one or two new threads a day about which computer to buy!!! if you can afford the high end 15 then buy it!!! threes no reason to buy anything else! especially if its a desktop replacement! I don't care if people say they don't need the speed of a 15, you will eventually as the newer software released is going to be larger and require more juice! anyone that makes a thread about which computer to buy is silly, all you need to know is get the best you can afford! it will pay off now and in the long run. Not to mention theres exactly a 1 pound weight difference between the 13 and 15. That is virtually nothing! and these computers almost look the same when they are both closed, but theres a huge difference when you open the screen Im really just talking about MBP, the air is a different story. but still can fall under the topic of this thread. which is don't ask which computer to buy if you can afford any of them!! so what if you buy more power than you will use! you never know what you will be doing down the road and it'll be cheaper to add another 500 now than adding another 2000 later for a new computer!