Hey , I'm returning my Surface Pro 4 because of poor battery life and the stupidity of Windows. I own a 2014 Mac mini that is specced out and is connected to two monitors, and it is a really nice computer and setup. I usually use it for processor intensive tasks. However, for school I need to take notes and do research when i'm away from my desk. I want to get a MacBook Air because of it being affordable, portable, OS X, and most importantly long battery life. I know I want the 13" Air but should I get 4GB of RAM or 8GB of RAM? It is a $90 upgrade for students like me. I don't intend to use the notebook connected to displays ever, which 8GB's of RAM would be very useful upon doing so. I do intend to use it for heavy web browsing, Evernote, word processing, and everything a student would do. Thanks