I had my QS4s and have my QS8s mounted right up next to the ceiling, about 2 ft in front of my couch. It is not... ideal. When I'm sitting on the couch, I can hear that the surround material is above, and while it is somewhat enveloping, it is not nearly the effect that I get when I'm standing in front of the QS8s--and when I'm doing that, I can't tell how high they are.

I am the Doctor, and THIS... is my SPOON!