Dealers with excellent listening rooms?

GTT Audio in New Jersey. 

Two of the best show rooms I have been in are GTT Audio in Long Valley, NJ and East End HiFi in Coram, NY (Long Island).  Both operate out of home showrooms and setups show extreme attention to detail to extract the best of their product lines.  Very impressive.  The owners are very knowledgeable.  Appointment only.  

Quintessence Audio in Morton Grove, Illinois (Chicago suburb) has the best rooms I’ve experienced, and not by a small margin. I traveled to hear different speakers and knowing a bit more now, I’m amazed how overlooked acoustic treatments and proper listening spaces are in many dealers. 

@gestalt in Nashville. Some of the best sounding gear I’ve heard in my 30 years of audiophile journey. 

Most cities have places that are sufficient to get the essence out of the equipment. In Portland Oregon it is Pearl Audio, Echo Audio and StereoTypes.