I'm looking to replace the drive in my Ti15/1Ghz/1Mb/Superdrive. There are two drives I've been looking at. Seagate makes a 2.5 60Gb 7200 Rpm drive, and an 80 Gig 5400 Rpm drive. I think the drive in mine is a 60Gig 4200 Rpm drive. The question for the group today is... In your opinion, which drive would YOU go with? and why? Thanks John Belen Lansing, MI