I agree completely. Usually computer parts dont really have any performance curve or wear down that much, especially hard drives.
I have a few 400mb drives that still work great.
I have never gone wrong with western digitals. I have about 5 or 6 of them now. Never a problem. ALso i know my shop has maxtors in its p.o.s. computers that run 24/7 and never have had problems either even with like no circulation of air and like constanly running hot because of dust. But i say go wd