I've got two Lacies: attractive aluminum cases, fanless, pretty quiet, south of 200 bucks for 2TB, maybe well south, depending on model. Purchased from Amazon @ competitive prices.
Whatever you do, I'd rip my material to two drives, and keep one off site (say at work). This is a pretty cheap way to ensure not having to repeat a lot of ripping labor if there's a failure.
Some people use RAID arrays for redundant storage, but for audio, this doesn't buy you much. You will be up and running immediately if you have a drive failure, but this is not very important for a hobby, and having a RAID doesn't protect against "environmental" failures like fire, flood, children, pets, and theft.
John