Originally Posted by Muppet
One of the Scyth Ultra Kaze will do it nicely. I'm using 2 of the 3000 rpm versions on my CPU heatsink and a good fan controller. They pump some serious air, even at low fan speeds.
Recently got a few Scythe Gentle Typhoon 1450rpm fans myself and they're superb. Very good with static resistance, really quiet and well balanced. Scythe is good stuff