Well directly to my left and going back is the living rooms main window. To my right is a wall, but a little further back is the entry way into the dining/kitchen area.

The mounting would have to either be forward 3 feet where there is about 2 feet between the window and entry door, or in the center of the wall directly behind me. On the rear wall, and to the right (when I'm seated) is another window, eliminating the possibility of 2 rear speaker mountings.

I see now, after your comment how a 6.1 setup this way is a possibility. That thought just hadn't occured to me until just this moment.