I've Had to RMA 3 Maxtors (a 30gb, a 40Gb, and a 10gb)
I've had to RMA 3 IBMs (2 x 75GXP, and a 20gb deskstar)
I've had to RMA 1 WD (an old 6.4GB drive)
Then Again I have owned the most Maxtor drives (about a dozen or so over the years)
I have owned SCSI seagate drives and one IDE seagate, never had one fail
used to have a Quantim drive, never failed
Never really bought much WD stuff until their SE drives came about, havent had a problem with any of them
In General I have had the worst luck With IBM ... hopefully the drives I got back from RMAs continue to work ok.