Hi all, ive just listed some XCM high speed cooling fans on ebay, these have a temperature display and manual and auto fan speed controls, a good alternative to modifying the stock fans to run on a fan controller or just putting up with the noise at 12v.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=110160731903
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=110160731903