Seagate and Western Digital
Maxtor sucks (they had a 160GB that was a disaster 30% failed) but should get better now when Seagate owns it
best is to get a raid cage where you can run Raid 1 plus hotspare
(3 drives being exact copies if one fails you just swap it without any losed data same if you should have two drives fail you are still safe if all 3 fails you lose it
)