Fujitsu or Maxtor, but given the prices between the 15KII and the MAU, the Fujitsu comes out ahead by a bit. Stat-wise they are just about the same. The Seagate 15k.4 doesn't compare to either of these two drives. Their 15k.3 was good, but with current generation 15K drives, consider only Maxtor or Fujitsu, and pick whichever is cheapest.