I'm a big fan of the WD1001FALS (WD Black 1TB) - 5 yr warranty and only three platters. I'm buying more as we speak. I haven't bought any 1.5TB WD's, kinda staying away from that form factor until everyone pulls their heads out to resolve firmware issues on array cards and/or drives. I have 1.5Tb Seagates working on an Adaptec 5805 (8 port card) in RAID6, but that's the highest port count card they'll work with.
I have two sets of 24 x WD1001FALS drives connected to ARC1680ix-24's, so consider yourself good there. Just make sure you enable TLER.
I think we need another few months before any size above 1Tb stabilizes and isn't so bleeding edge, at least for arrays. I realize some people have 3Ware high port count cards working with the Seagate 1.5's, but still seems a bit sketchy.