I need advice on which one to get. Right now i have a 12 inch powerbook G4. it has a 80 gig hd. At one point i had less the a gb left of storage but i deleted a lot of stuff some of which i wish i could of held onto. The only difference between these two are 160 gig hd and a 250 gig hd...and one is black. I just dont know how to' decide how much memory i will need black would be nice to have but is that and the memory worth the extra $. and will having a smaller hd slow the computer down at all? Thanks in advance.