What is they best album out there for showing off the sound quality of your system.

Party Ball by Stan Ridgway on cd or Vinyl ia a great recording for showing off your system. 

As many here, I've a cadre of MFSL, Three Blind Mice, Chesky, VTL, Opus 3, RR, etc.  But going against all of these fine recordings is Gail Pettis "May I Come In?".  So well mastered, so intimate and a great talent with terrific support.

Also, Pepe Habichuela and Dave Holland "Hands".

@celtic66 Thank you so much for mentioning the Gail Pettis album, "May I come in?" It is terrific! It is a very intimate recording in that it is as if they are performing for you in your listening room. Gail has a great voice and knows how to tell a story with a song. This album is becoming hard to get, so don’t wait! Get it now. It just arrived today and I’m listening to it for the third time! I owe you one @celtic66

Lyn Stanley. any of her albums but especially her new one, "London Calling". masterfully engineered for showing off your system.