Im running a zalman cnps7000b and its really quiet and has pretty good airflow. My temps have only risen 4 c since i took my thermaltake (i think it was a slk900 something like that) heatsink with a vantec tornado off. In my opinion its a really good heatsink/cpu fan for how quiet it is. Was only 30 bucks to.
Don't like 120mm cpu fans personally, there a pain in the ass.