My dad is looking for a good sized external hard drive to pair with his PowerBook. There are a few questions that have come up. Will Firewire-800 make a big difference in transfer speeds (if the drive is only 7200RPM w/8MB Cache)? Should we build our own drive? I found an OWC drive that has a 2 year warranty, Firewire800 and Firewire400, 160GB 7200RMS w/8MB Cache for $199 shipped. Can anyone find something better?