Fan speed wasn't really the problem, it was the temps. I had to manually set the fan at 80% or higher to get comfortable temps in most games and that was a bit too loud for my taste.
I just did this though and what I have on there now, a cheap 90mm fan, is about as loud as stock was at 65% and it's about 15 degrees cooler under load. Not bad for a simple mod.
I'll probably be ordering the T-Rad2 GTX as I'm sure it'll produce much better results I'm sure.