Arctic P12 PWM and P14 PWM fans are in my opinion underrated. These fans deliver airflow performance and noise levels the same as other well known fans that cost 2 and a half times as much. In addition to being quiet, they have a decent amount of static pressure too. I've been using them as radiator fans and as front chassis intake fans. I get better performance RPM vs RPM from these fans than stock fans with significantly less noise - which then allows me to run the RPMs higher for even more performance while still remaining quiet.