I can see how your room is very similar to mine.

I think it's a wonderful layout but, as you probably already know, it's not optimized for audio since your seating areas are away from the "acoustic centre". You may want to think about rotating the TV/speakers/seating areas by -90 degrees so that the TV and fronts are along the wall where your couch is presently located. Are you wiring for 7.1?

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated