You do not want 5200rpm fans on anything unless your idea of fun is walking around with earplugs and adding a 1000w amp to your TV soyou can hear it..
Stick with fans in the 2000rpm range..
Oh, I have 2-120x25mm 113cfm 3600rpm Delta's on a very high end midtower and you can hear them 10 ft before you hit the room the machine is in..
I also have 8 of those on a MM Extended Ascention but thankfully those are on a fan controller thats never turned up more than 50%