Actually if you are using passive baluns up the coax PTZ controls work great. I would run the CAT5 because you then have three extra pairs at the camera. Which works out great if you add another camera near by at a later date, just have to run back to the existing camera and jump on another pair. It also gives you the extra pair if you decide to add a camera that does not have up the coax control but a hardwired 422 or 485 data line. There may also be a cost savings with the CAT5 too, I have seen some good prices from suppliers trying to unload it to make room for CAT6 and CAT6a.
