Thanks to those of you who took the time to offer suggestions. The ceilings are vaulted, 18’ high, without “attic” space behind them to install a speaker box in wall, and this is my living room, not a dedicated home theater. My wife is OK with installing speakers high on the walls, but doesn’t want speakers hanging from the ceiling. From the MLP this speakers would be mounted approximately 35 degrees from ear level to the front and 30 degrees to the rear. There would be about 8’ of vertical separation between the top of my front towers and the base of the height speakers. None of this is ideal, but I’d still like to move forward and make the best of the situation I have. I’d still welcome any other suggestions, but these are the parameters I need to work within. If the opinion is “I wouldn’t bother”, that’s welcome too.