yeah thats what I was going to do... but I cant mount my heatsink until I figure out if my single fan should be pushing air through the heatsink or pulling air from (due to already installed anti-viberation strips).
I use the same identical setup, ultra-120 Extreme Revision C. You want to push air through for best results. If possible, room in the case and money, add another identical fan on the other size of the heatsink to pull the air also. The RPM from the push side fan will also increase because you're pulling with the second fan and creating less resistance, like opening a bedroom window on the opposite side of a house to draw air through. My Q9650 Quad overclocked to 3.6 is idling at 24C like this.