Went ahead and put the Q6600 on water, now idling at 25*C. Not bad, it's with an EK Supreme HF, 2x DDC, 250mm res, and a Thermochill 120.3.
Booted up and was rolling at 3.6GHz in 10 minutes. Sadly though that seems to be the limit of this board as it only has a 4pin CPU plug. Even 3.65GHz failed, it just wouldn't boot. D: