THG's posting a CPU cooler roundup so big that they've broken it into three different parts. They test 80 different coolers from 30 different companies on a QX6850, so your potential choice for cooling is most likely covered in this one. Part one has been posted today.

"Keep cool! That's what CPU coolers are there for. 45% of our candidates fail our test. We uncover weaknesses and expose false promises."