Re: good relaible External Hard drive
Every hard drive is due to fail. All externals do is make it more "mobile"
Exactly why do you need it so high? Unless you backup full DVD movies, 320-500Gb is plenty.
But for Externals, I would go with Seagate, Western Digital, or Samsung.
For simple backups, the "slim" version (USB only) is ok.
For streaming movies or music, or just simply have it always on, I would reccomend one with external power.