I used TextDrive for about a year (middle of 2005 to 2006), and they simply could not keep their servers up. I hear it's better now, but I'd be very careful before jumping into that boat. I don't mean to derail the conversion with negativity -- just trying to show the other side after a couple TextDrive recommendations.

Honestly most hosting companies have one fault or another... If you're going for a dedicated box that you control (or share with a few people you trust) you will already be ahead of the game. Good luck! (And let us know what you decide on.)