So this will be my first Mac product other than an iPod Classic so I really have no idea about how the OS works, but I'm thinking of getting the base 13" MBA with 8gb RAM (I'm a very on-to-go college student). However, I have about 70gb of music and will probably download up to 20gb more in the next 3-4 years; will 128gb be enough space? I really won't be storing anything else (some pictures and documents and apps; movies will be on an external HD, but I need my music all the time). My Windows computers always get filled up with a lot of random crap and always start out missing a few GBs anyway. $300 just seems like a lot for more space! I'm thinking of maybe getting the upgraded 13" MBA and sticking with 4gb RAM on that? From reading a lot of the forums though, getting the 8gb RAM seems to be the only smart way to go. Sorry if this was confusing; I don't know how Macs work so I want to be an educated buyer!