Thinking about your Master Series purchase. I have a wall on one side of the room to mount surrounds and a "pole" on the other side. What type of mounts do I need? Do you sell them? Do I have to drill into the speakers to secure the mounts? Will the QS4 sound "OK" with one mounted to a wall (with plenty of reflective surface) and the other mounted on the "pole" (no reflective surface)?