Before you burn it. Get a AP-30 or AP-31, i could only get them from frozencpu, none in AU when i last looked, so order every thing you need at the same time to get freight to components at a resonable price. Get them to stick a 3pin on the AP-30 or 31 for $5 . These fans are the best that you can get with the below mod, @ 4250rpm as pwm, you could take it quite high then.
Rewire the AP-30 or 31 to the below
Mobo PWM - there is a 4th solder point on them thats for PWM, so add a new 4 pin cable. Once you solder it up you will have 2 leads one 3-pin(goes to fan controller) and one 4 pin goes to mobo cpu fan header.
Mobo PWM 4 pin - remove the red positive wire
Fan controller 3 pin - remove the black wire
Now your mobo will control the fan by what you set it for pwm, and you can also see the rpm's as it boots up in the fan controller, and also know if the fan does hit max rpm booting up knowing that your on the edge of you oc
Or better still go look at the forums here for LN2/Dice , i was thinking of water cooling for the OC rig, but i might go Dice now instead