So that leaves:
1. Seagate (aka Samsung, Maxtor, etc)
2. WDC (aka Hitachi, IBM, etc)
3. Toshiba (aka Fujistu).
And Toshiba appear to only sell to other big OEMs (like IBM, HP, etc), so for the common person, it's either Seagate or WDC.
Truely, as Merc put it. GODDAMMITSOFUCKINGMUCH.
A...