get the accelero Rev2 from Arctic cooling. It has also a "turbo"module, basically 2 fans that attach to the heatsink.
Very easy to mount, results are impressive with extremely low noise.
I have one on my 512 8800GT ... in full load after hours of gaming the GPU core is at 52-54degrees. In idle is at 43..45.
I cannot emphasize how good, silent and easy to mount this heatsink is.
Haha that cooler is Great. I got one stock on my 9600GT and it keeps it cool for a passive cooler. I also did a little mod to it for OCing where I zip tied an 80-mm fan on it and now I don't go above 38 Degrees C. I have my card set to 770/1800/1900 (Core/Shader/Mem) from stock 650/1625/1800. Like I said Great.