What is the most high performing 120x120 slim fan?

Hi guys, as I have a bit of a "space" problem, with my radiator fans hitting the mosfet/vrm heatsink of my motherboard for just a few mm, I am looking for the most high performing 120x120x20 (slim) fans.

Any suggestions?

I often just cruise over to frozen cpu and check out all the specs of the fans until I find some im satisfied with. Otherwise you will get a 1000 opinions from 1000 people.

I never had any problem with 20mm Yate Loons. Only downside is that if your mounting them in the top you may need to replace them after a year as the bearings aren't that good.

Thanks both for the tips!

I just installed 4 pure wings on my radiator. CPU core temp dropped 7c over the Antec case fans I was using and these things are silent.

Thanks... Though pure wings are not slim. Slim are from 20mm and below of thickness.. Purewings are standard 25mm