I work as a Macintosh tech for a College, I recommend Maxtors firewire drive, solid aluminium case, very reliable. Or if you are a roll your own kind of guy I also own a ADS pyro kit (
www.adstech.com), basically an ide to firewire bridge, and pop your own drive in, I just change drives in and out of it, so it has taken a lot of abuse.
Personally I am not a fan of West Dig stuff, have had bad luck with it, that and stay away from fantom external firewire drives, they suck.