I normally go with Maxtor, failing that Western digital. I normally get them from ccl computers as nearly all the hard drives have 3 year warranties (unless I can find it cheaper with a 3 year warranty) click here for prices click here
On personal experience, I would suggest staying clear of IBM/Hitachi. Mine was very unreliable after a year of use and has since been replaced by a pair of WD Caviars, the OEM versions of which have a 3yr warranty.
I've no personal experience of hard drive failures so the only recommendation I can give is to buy one of the well known makes and get one with a 3 year guarantee. Hope I'm not tempting fate by saying that!
Gaz 25's advice re IBM is very sound, based on family experience, of two large capacity drives that packed up whilst being used by my son.
IBM's reluctance to replace them took some overcoming - they had been used in a server and IBM claimed that they were not intended for more than a few hours at a time.
Not much use in a server....
I've always had fine service from Western Digital drives (bought a 60GB WD600JB about four months ago with three year warranty), but have also been served well by Samsung and Fuji models over the years.
The problem Fuji had with its drives about two years ago was due to a faulty component from a supplier (around two million of them so a lot of drives were affected).
It put many people off Fujitsu drives - a shame as it is a major world manufacturer and has been for many years.