Very clean setup. These new LGs are amazing. Display is flanked by two Sonance invisible speakers hidden in the wall, powered by a Sonos Amp. TV audio via ARC/HDMI to the Sonos. I am really impressed with the Sonos amps. We did 8 of them with Monitor Audio CP in-wall and in-ceiling for the house audio. It rocks..

ETA: The fireplace has an auxiliary exhaust system that pulls the heat down into the basement via ducts to keep it away from the TV. Not my favorite application, but the client knew what they wanted.