While the Big Tyhoon may pwn temps, it also pwns airflow. I personally have never tried it but people on here seem to like it a lot. I just bought a new air cooler today.
I was trying to decide between a BTVX, a Zalman CNPS 9500, or the Zalman 9700. Well I saw a review that pinned the two Zalmans against each other in testing and the newer 9700 got the edge. Not by much though.
So BTVX or 9700 now. They both test amazing and it was a really hard decision to make. The deciding factor for me however was airflow. The way the Zalman is oriented, it will blow hot air towards the 80mm fan at the back of my case. The BTVX will shoot air down at your motherboard.
Also, in reviews I noted that there was a big difference in what they were saying about the contacts. The pictures speak for themselves really.