Thanks for all the great feedback on what type of hard drive I should get to back up my MacBook Pro.
I went in to the Apple store in Chestnut Hill Mall to grab a LaCie Rugged Firewire 800, thinking that I'd be using SuperDuper to backup.
Firewire seems to be a better choice since it's faster than USB and you can book off of it.
The Apple Store didn't have the Rugged drive, but it did have a 250 GB Western Digital MyBook drive with a triple interface for $159. That seemed like a fair price.
The MyBook drive also comes with EMC Retrospect Express software which is made to both backup and restore your entire system. That's exactly what I need to do.
Any suggestions before I start?
My MacBook Pro has a 120 GB drive in it so I think I'll be able to partition the MyBook into a 120 GB and a 130 GB leaving one partition for backup and the other for regular storage. Sound good?
