Setup for TV Music in Home Gym

Hey folks, we have a rectangular room, roughly 15' x 22' that we use as a home gym. We have a 65" flat screen mounted on one of the shorter walls, and have a Sony Receiver and Apple TV hooked up to it and two Klipsch tower speakers. I'd love to get rid of the Sony Receiver, and upgrade the audio system.

Note - we don't use it as a home theatre, rather we like to play loud music via the Apple TV and Youtube on the TV,. I know as a sound source that prob isn't the greatest, but thats what we are using. Is there a Sonos setup you could recommend that would get rid of the receiver and work with our Apple TV? Would it rival the klipsch speakers for loud music?

Thanks!!!