mattd
I would also add that it sounds like you're working with a very considerable distance, and the BMPCCs are very light cameras. Even with a great fluid head you may run into some shakiness or operators that can't nail their moves since the camera setup isn't heavy enough to bring down the center of gravity or provide enough resistance.
Consider going with a beefier fluid head like the Nitrotech 612 or aktiv8 and adding some weight to the camera setup. I've used steel plates between the camera and camera plate before (with a hole/slot drilled out to allow for the mounting screws) to achieve smoother shots on less than ideal fluid heads.
