[Toaster]

Hello folks,
"Harris", It sounds as though you went overboard. Try killing some of the fans and check temps. Remember that fans create the most "noise" on the intake side.
On most cases, the intake area directly in front of the fan is often numerous holes instead of a simple "hole" the size of the fan. Were this a simple opening instead of "several smaller holes", the fan would be far more effective and GREATLY reduce noise.
Here is an experiment to demonstrate my point:
Power up any typical fan in a fashion that allows you to hold the fan in your hands whilst it is running. (use care to avoid injury)
With one hand, move your hand closer to the "intake" or "induction" side of the fan. As you come closer, noise increases and flow reduces.
Now do the reverse. Move your hand closer to the exhaust side of the fan. In this, the fan increases somewhat but airflow remains the same until you cover the can almost entirely. So, the fan is far more efficient "blowing" then "sucking". The bottom line is this: Keep the induction side of the fan clear. You may need to make some case mods but noise will be greatly reduced.
From here, reduce the number of fans or reduce thier voltages.
You should easily be able to reduce noise by 50% or more.
The experiment really gives you an idea of "fan function" and is VERY informative.