Hello mac people. I've finally decided to make the move to a mac after lurking for quite some time. I have a couple questions about upgrades... Right now i'm thinking of a 2.2GHz MacBook, 120GB hd. Is it worth it to bump up the RAM to 2GB from 1GB? I'm a med student and use my computer mostly for powerpoint lectures, email, internet, music and pictures. I know this doesn't require a ton of computing power, but I also have *gasp* Vista and a few programs i'd like to also run on my new macbook with the apparently awful Parallels. Oh yeah... i'd prefer not to blow tons of money on this, since i'll be paying this computer off 20 years from now.