I have a LaCie 1TB Bigger Disk Extreme and three do-it-yourself-type external HDD enclosures. I recommend going the d-i-y route. Interal IDE drives are super cheap, and when you add an external enclosure to the cost you still save gobs of cash compared to the ready-built external FW hard drives.
Here are four external cases for you to consider:
this one has FW800
FW400 and USB 2
a black one and the
same thing in gray
They currently range from $58 for the FW800 case to $40 for the last one. There are cheaper enclosures without fans available from that site, but I wouldn't want to risk a fanless enclosure, unless it's
this one or
this other one. Of course, these last two are a bit more expensive.