I have a few pictures on my website that show my DIY mounting for my Q's. Nothing more than some nice "L" shaped shelf brackets from Menards with black plastic covers to conceal the wires. They are mounted to a bump-down area where I boxed in our heating/cooling duct work. I would say the bottom of my Q's are about 7ft off the ground and they work great.

http://porterplex.googlepages.com/porterplexpics

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85