G-Tech.
Lacie [they are only the front end and case] which can be shaky depending on model, the Rugged is pretty good.
Choice depends on connectivity and usage. I now go for solid, bullet-proof externals, you pays your money you makes your choice. I have 1Tb and 500Gb G-Techs with Hitachi innards which have never given any problems in three years and I am one of those that problems will arise with as I do things with kit and software that one shouldn't.
Last night it looked as if I had lost a 1Tb, directory destroyed, power down drive, wait five minutes, power up and it was up and running. Did a de-frag just to be sure anyway.