Couple of comments... If you are going to do actual editing on an external drive you will probably need to go with Firewire800 and or SATA. USB will unlikely be fast enough. Also get a fast drive, 7200RPM or faster.
Some people don't like Lacie or OWC or whoever, neither of whom actually make hard drives. If you have a drive failure and it wasn't the power supply or the controller then it wasn't Lacie's or OWC fault. I use dozens of Lacie Quadra drives at my office, I use them exclusively and have not had one fail in almost three years. Of course your mileage may vary. For editing on my MacBook Pro I use this http://www.pcconnection.com/IPA/Shop/Product/Detail.htm?sku=10055890&cac=Result It is awesome, triple interface (USB FW400, FW800), 7200RPM, bus powered. It is great because it is portable and fast. I don't need an extra power supply when I am on the move. When I am home I can daisy chain a FW400 drive off the back when needed. There are several different versions of this, just make sure to find the 7200RPM one. - C. Thomas
