I have 2 of these acting as exhaust fans. They are quiet and keep the case cool even under load. Granted, mine are 120's. As noted below your first posted, I just ordered the silverstone 120mm as an intake fan. I currently have an Apevia but am looking for a little better airflow.
I also have a 80mm Masscool I zip tied to the other side of the HDD cage to help accent the airflow from the 120 intake fan. It is also right in front of my VGA card (1900XT). My VGA doesnt run hotter than 65C under load.
The 80mm is the noisiest fan in the box at full speed. If I have room I may move my old intake fan to the spot the 80 is in now or just wait and see how the Silverstone works by itself.