All my HDDS are Seagate, I got 3.
I got one 1 TB 7200 RPM, 1 500 GB 5400 RPM and an external that I don't really know the specs for.
I've had no trouble with them being noisy at all, but I have some expensive sound isolated case so...
Sata3 will make a difference in transferring a lot of data between HDDs if both HDDs has it, but it doesn't matter for much else, since only very few other connections are fast enough to use Sata3's full potential. I didn't feel any general performance change when I moved my OS to a better HDD. Maybe defraging and scanning for virus was a little faster but...
It's very hard to review a HDD; I have had no problems with either of mine so far, I've had one of them for almost 4 years. The other one is a couple of months old.