Vantec's 92mm "Tornado" fan, spinning @ 4800 RPM with a total CFM rating of 119 is perfectly matched to the requirements of the ThermalRight SLK-900. Just make sure that you can handle the noise (which is very audible).
Make sure that your board can handle the SLK-900, as she is a whopper of a heatsink (1 LB of pure copper), without a fan.
Check out this link to ThermalRight's website, which shows Socket A Motherboard Compatability Information.
http://www.thermalright.com/faq_900_Motherboard.html