I have a room similar to yours but with an even higher ceiling. They say it is hard to get good sound in a room that size. I say hogwash. I have the Sonus Faber Homage Amati Tradition speakers powered by a Raven Integrated Reflection Tube amp. My streamer is a Lumin X-1. I had Wilson speakers prior to the SF's. I absolutely love the sound and look of SF.
