I don't know if it's over-kill or not, but I went with the same cooler, with the same fans as intakes, in front, and another pair of intakes on the bottom of my case; with the same fans exhausting at top and one at the rear for exhaust. So far, it moves plenty of air, and is nice and quiet.
Intake stream is currently 21.7°C with a 23.5°C exhaust stream, μP is at 35.6°C.