I have an AC Freezer 7 Pro and am incredibly impressed with it's performance. My room is cool, but it keeps my D805 @ 3.8 at 47C under load. @ 4.0Ghz it climbs to 51-52C due to the increased voltage.
I would recommend getting a little more exhaust in your system, but give the two 80mm's a try and see how your temps are.
A good way to test if extra intake/exhaust is needed is to record all temps under load and at idle in normal conditions. Then take off the side panel and do it again. If there is a dramatic drop in load temps on the cpu (~10C) you will be needing a way to get more intake/exhaust.