I'm undecided about what to get. My choices are the non-retina MBP and the newly announced MBA. I'm a teacher / online grad student and I don't really do gaming (only when I feel like it and besides I have an iPad). I use my computer mainly for office applications, some music, movie watching, video streaming, and some downloading (rarely). The upgradeability of a non retina MBP sounds very promising for the future but the portability and speed of an MBA is a major advantage. The non-upgradeability of the MBA is a turn off for for me while the weight of MBP is too much for me. Do you think it's also necessary to upgrade RAM and memory drive for whatever macbook I choose? I'd like this laptop to last for a long time like at least 5 years. Do Macs last that long? This is my first mac btw. Thanksss!