unfortunately my viewing position (couch) is against a wall so back surrounds is not likely to work. How about presence speakers? Do they make a nice contribution to the sound? Setting up a second room with the m22's and a sub might make a nice alternative system. I do have an extra receiver and sub. matter of fact that sounds very doable

M22's M60's VP150 QS8's EP350 Yamaha RX-V2700 Yamaha YP-D71