i-rocks IR-9200-BK 2.5" USB2.0 mini External Enclosure - Retail

Cons: Relatively cheaply made; if you shake it you can hear the drive move back and forth a little bit (nothing that's going to cause any problems, plus who's going to be shaking it?). Not a weakness for me, but others might see it so; the lights are very bright (and it's not a string of lights, just one at one end and a textured piece of plastic to transfer the light for the whole length).

Pros: Nice black aluminum, easy to install drive, works like a charm. Cool lights (but they are NOT purple like in the pic, one side is blue to show power, and one side is red to show activity). Most drives will run on just the USB power, but if yours needs more there is the option to plug in an AC adapter, or you can use the supplied cable to tap into another USB port for extra power (USB to generic adapter plug, nice touch).