I've had 5 seagates (4x200GB and 1x80GB) and 4 western digitals (2x40GB and 2x 36GB) in the past 3 years and had no failures for either brand, whilst over the same period I've also had 3 Maxtors (2x80GB and 1x160GB) and 2 of them broke.  They were replaced quickly under warranty but thats not the point - you can replace a drive but not lost data (and having to restore from backups is still a pain in the ass).

Personally for a storage application I wouldn't have anything other than seagate now - very quiet, very reliable, fast enough and with a great warranty