I had really good luck with my Hitachis. They have a program on their website called "Hitachi tools" it allows you to make the Hdds quieter. But to me I was happy the way they were. I was using 4 80 gig Hdds in Raid0.
I also like my WD Hdds.
Here is a link to a place that has some good info
http://www.endpcnoise.com/
I also like my WD Hdds.
Here is a link to a place that has some good info
http://www.endpcnoise.com/