Atom,
If you use the supplied T-bracket to mount your QS8s, you must use bare cable connections to the binding posts, which of course are as good an electrical connection as any other. But there is no room for spades, banana plugs, etc. You might wait until you get your QS8s to experiment with height. They are not critical--anywhere from 2 ft to 5 ft above your ear level to each side, and a little behind the listening area.
Every room is different. It's sometimes useful to enlist a couple of assistants (or stepladders) to temporarily hold the QS8s in different spots as you listen to them. My own QS8s are at different heights and one is farther forward than the other. In my room, it doesn't seem to make any difference when I move them.
Regards,
