I also use a Delta 60mm, one way to reduce noise from it is to get some 3M foam tape and cut small triangles out of it, then place them on the corners between your heatsink and your fan. Also, my friend rigged his up with a voltage regulator and lowered the speed of it... amazingly enough the Delta is pretty dang quiet around 5500 - 6000RPM's. And still cools very well.