First: Maxtor D740X - because I've had nothing but great experiences with them and I've worked with them for a while.
Second: Seagate Baracuda IV - I own a 80gigger one now and it is QUIET. So quiet, I'm afraid I won't be able to tell if it is going to die or not. Wow, it's quiet. MAN! It's QUIET! BTW, it's quiet... REAL quiet. lol jk. But it is quiet. A nice drive.