I just wanted to get someone else's opinion on what I should do here. I currently have a 1ghz tibook with its original 4200 RPM, 60 GB hard drive. That's not cutting it anymore, so I am trying to upgrade spending less than $150. I am trying to figure out which would be better for my $150: A 7200 RPM, 80 GB drive, or A 5400 RPM, 100 GB drive Also, would I notice a big difference between a 8 MB and a 16 MB cache on a 5400 RPM drive? Any advice/opinions would be a great help. Thanks!