The ceiling bracket is nice if you have a doorway or window to contend with and cannot mount them on the wall. I have ceiling mounts because I have both issues, in my living room, with 8 ft ceilings, and they work great. Even though there is only 3" of breathing room, I do not notice any acoustical differences compared to when I had the speakers wall mounted in a different orientation.
But, with 16 ft ceilings I definitely would not want to ceiling mount the speakers. They would not sound that great coming from way above you (not to mention the difficulties of trying to mount them that high anyways). So, Karena I agree with the other two, go with the wall mount.
