Like I said Seagate has been a pioneer in HDs for a long time and you couldn't go wrong with a 5 yr. warranty.
http://www.seagate.com/www/en-us/abo...any_milestones
Buy one and quite asking questions.
Honestly, I don't know that a 5year warranty means much if you lose all your data. Longer warranties may imply a less reliable device, not a more reliable device, because a way to sell it may be to increase the length of the warranty. For example, in car sales, traditionally less reliable manufacturers have longer warranties and more reliable manufacturers have shorter warranties (hyundai (sp?) and honda, for example fit those two categories, where honda only has a 36 month warranty, wherease hyundai has a 10 year warranty). The new perpindicular hard drives that seagate sells are likely where things are going. But one might reasonably be concerned with the reliability of the technology at the momment.
I really haven't had any problem with any of the three manufacturers, though.
Cheers.