1-what's up with the ceiling tiles? I'm assuming that they are acoustic tiles since you have done so much else. Have you tried opening up just a few (put grids in)? It will allow some sound to go up and never come back down.
2-If it were my room, I'd have the bulk of the acoustic treatments either behind the speakers or behind my chair. Some side reflections are necessary to fill in the room and most speakers are not designed with "infinite" space in mind.
3-Although you have a simply awesome system, it may not be right for you? Borrow some speakers from a friend or dealer and see if they make you happier? Something more open like Vandersteens or even Martin Logins may appeal to your taste? This is why many of us have multiple speakers and amps & are always changing.
2-If it were my room, I'd have the bulk of the acoustic treatments either behind the speakers or behind my chair. Some side reflections are necessary to fill in the room and most speakers are not designed with "infinite" space in mind.
3-Although you have a simply awesome system, it may not be right for you? Borrow some speakers from a friend or dealer and see if they make you happier? Something more open like Vandersteens or even Martin Logins may appeal to your taste? This is why many of us have multiple speakers and amps & are always changing.