I had the same problem with the 4th wall not existing & opening into the kitchen area. Because of factors such as room decor & obstructions - wall & cieling mounting was either too laborious or not practical.
Because my room could blend speakers well near the sofa, I used adjustable stands rated for 10lb speakers and they work like a charm( back mounted of course). Cool thing is my wife doesn't notice them & they sound good despite the fact that are only 5" above my ear. You could always be in the eternal persuit for audio perfection, but I reasoned that if it sounds good, stick with it until another option opens up.
For me going from crappy Bose speakers to Axioms, the most jacked up placement would be an improvement over what I had.
good luck!
