Just trying to work out which size MBP would be best for me. I have the option of getting the lowest spec 13" or the lowest spec 15" (for funding reasons I can't change the specs at the time of purchase). Ideally I'd wait until SandyBridge comes out but I have to buy now for school. I'd welcome any thoughts on whether the 15" will outlast the 13" in terms of future OS updates etc. or is there really no difference between the two. I would ideally need the laptop to last for 3-4 years through college. Also is the 15" worth the extra money I would be paying? Or do you think the difference is negligible. I'm a college student so value for money is important at the moment. Will the updates that come with Sandybridge be loads better than the core i5? I will be using the laptop for the following tasks... Programming in Xcode and other IDEs maybe Eclipse or BlueJ (I hope to major in CS) Running Parallels Design/photoediting/drawing with CS5 Surfing web Writing reports (MS Office) I am slightly worried about the portability of the 15" but I will likely spend most of my time working with it at home rather than carrying it around. The extra screen space appeals to me on the 15" for design work/programming.