In your PM, you suggested getting this fan.
Honestly, I think it's overkill, and without a dedicated fan controller, I would never risk my motherboard by running those direct to the PWM connects on the MB. They run at 0.8A, which is a lot for a cooling fan. You run the risk of frying your PWM headers on your MB, and potentially your MB completely--I've actually seen it happen.
The other thing you need to remember is that high CFM =/= (does not equal) good static pressure.
That Delta fan above is designed to be a case fan (i.e. move a relatively large amount of air, but with no restrictions. Whereas, a CPU cooling fan for a HSF is designed to have higher static pressure (more less air, but more "forcefully" through confined spaces, such as the heat sink fins).
I would suggest two of these Cougars
in a push/pull configuration with the cooler I already linked about. Longer life, quieter (do you really want your LAN buddies to hate you?...lol!), and relatively low risk plugging them in straight to the MB.