I'd go for the samsung or the WD disks.
I have two very old HDs , one samsung, one WD and they are still working excellent.
Whereas I know a lot of people with problems with Seagate HDs and Maxtors.
Seagate is more troublesome than Maxtor though, IMO.
I have no info about the Hitachi disks, russ might have a point there.
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