I meant putting the fronts 2 feet from the side walls, not from the front wall so you can use the shelves you have now, just move them closer to the TV and away from the side walls as well as lower. The back is really tricky if the room is open on the left. People tried mounting QS speakers to the ceiling using angle shelf-support L-style brackets. You can see that mount and some discussion of how this may look and sound here.

Axiom Setup