What is the most reliable 1.5 TB hard drive available?

I would like to replace the 250 in my G5 with a 1.5 TB and also at a second one.

also If I have two 1.5 TB drives in my G5 is it possible to put them in a Redundant RAID?

Should I put them in anny sort of RAID?

I also intend to install a SATA control in my G4 and put 2 1.5TB drives in that as well and set it up as a torrent/video box.