I'm thinking about getting a rev 1 12" g4 ibook. Hopefully I can get one for US$800. What will I NOT be able to do that I could do with a new 12" ibook? I'm not a power user-- I'm just looking for mobility, iapps etc., but I AM interested in using Garageband. Would I be better off sucking it up and getting a new 12" for US$1099 ? Thanks.