External Hard Drive Recommendations?

This is the one I use. Western Digital HDD, eSATA support, always cool and very reliable. Have had it for almost 2 years now.

I essentially use the same one, except it is the Green Drive Variation. The thing about it I like the most is that it has a power switch so that it doesn't need to be left on when not in use; and therefore not build up heat which eventually can lead to damage. Seconding the recommendation for the external enclosure+HDD Combo provided by Fantom Drives.