In no way are WD bad though, I am running a 250GB WD in my little monster right now. I can't tell you if its quiet becuase my other Apevia 120mm fans are louder than everything . Still pretty quiet though.
seagate barracuda 7200.10 have a 5 year warranty reliable and the fastest 7200rpm hdd's on the market but they run a little hot and dont trust the reviews loads of people have said the 500gb are loud they must have got a bad batch because mine are quite as of course the only thing i can hear on my case is the zalman