I think I'd preferred a nice 3.5" FW drive with a fanned enclosure for that... they're a bit mote expensive, but if you suddenly might have to rely on it as a boot disk a FireWire disk should give you better overall performance over a USB one... also a typical 3.5" disk @7200 in a self-powered and fanned "desktop" enclosure will almost always be better than the smaller, more protable 2.5" disks in enclosures drawing power from the connector... </over explanation>I'm just thinking worst-case here