Here is the link
for the thread. Actually it looks like Robin used the ZM50, which will definitely interfere with the adjacent PCI slot.
My advice: try the zm17cu. Measure the space from the back of the existing fan to the bottom chassis to determine that you have at least 17mm of clearance. Buy the zm17cu and compare it to the 9000 to see if any card components will interfere. Get a thermal sensor and measure temperature under load with the stock fan. Pop the stock fan off and apply the zm17cu with frag tape. Check the load temperature again and subtract 5 degrees celsius for use of the frag tape -- the resulting temperature is what you will like see when the zm17cu is permanently mounted. If the temperature is less than 60 celsius, everything should be fine and you can safely use the zm17cu. Use a Arctic Silver adhesive to affix the zm17cu to the card, and take card to clean and mask the GPU beforehand. Good luck!