what corkyg said about the vantec nexstar X2 - i've got 3 i've been using for 5-6 years with no issues whatsoever
as to which make drive, i've had too many seagate drives go out, some that only saw use (or power) when they were turned on for a backup copy - i clone my OS drive ever week or so - two of the seagates went tits up after 3-4 years, after what could not have amounted to 1/4 year "on" time.
I've since moved to WD Green - for two reasons, i'm a cheap bastard, and the WD Green 4 TB comes up for sale for $99, and $25 / TB is hard to ignore. 2nd reason, i can leave them turned on, as the "Green" is geared to going to sleep if not used for 1 hour. The 10 second wait for them to "wake up" is a little irritating, but again, it's only once every week or so
But from various user reports, WD seems to have the popular vote in terms of reliability
fwiw