i ordered a 15" 1.5 G4 w/ 64MB VRAM on monday. it still hasn't shipped. i noticed today that the upgrade to 128 MB is only $50. i'd thought it would be a lot more. but if i had known that... it just makes me wonder: do i really need 128MB? i don't play any games. i don't do video editing (although i might once i get it). and i don't do any CAD/3D animation stuff. pretty much just music/audio, and of course the internet stuff. AFAIK, even 64MB is overkill for my needs. anyway, with the order still open, it isn't too late. but is it really worth it, given my needs?