Not quite sure which machine to pick at the moment as far as specs go. So just to give you a better idea of what I plan utilizing the computer for I won't being do too much outside of typing papers for school, listening to music, a few mac apps here and there but not professional applications like photoshop or anything. I would like to know would I notice too much of a difference between the 2gb base model air or 4gb? How much would I miss out on with just electing to go with the 2gb model instead of the 4gb of ram? I really want to make the best decision possible here. In addition to music, documents, and using some iLife applications I think I may end up expanding my iTunes library but would that slow down the performance of the computer?