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

Review about One Mic Recording by Joe Whip at Audiophile Style.

.....These guys and this recording just rocks. Pace, rhythm, tone and soundstage are just off the charts.
The precise placement of all four of the musicians perfectly matches the photos of the sessions.
The balance of all four instruments is darn near perfect. As you can no doubt tell, I am a huge fan of this recording.
It is one of the best in terms of recording quality I have ever heard. Of course, and as always,
your view of the actual music content may vary quite considerably from mine.
Nonetheless, I think we would all agree that this recording sounds sensational....

I’d go for the one microphone recordings from Sound Liaison. They are like having the band in your room. Btw they are on Black Friday sale this week.’’Carmen Gomes ’’Don’t You Cry’’Feenbrothers ’’Play Dave Brubeck’’Rainier Voet & Pigalle 44.https://www.soundliaison.com/index.php

I’m a jazz and classic rock guy.  Very few classic rock albums make the testing cut, although Dark Side of the Moon is one of my go-to test albums.  Also Hot Tuna Live at the New Orleans House Berkeley.  But for real critical listening to test new components, my go-to choices are Patricia Barber - Companion XRCD, and especially the second cut, Use Me, which has a killer stand up bass intro.  My other go-to jazz album is the remastered Jazz At The Pawnshop — extremely well-recorded.  For interesting live imaging, I also use Shakti’s first album.  John McLaughlin and Zair Hussein on tablas is sublime!!!

Ron Carter’s Great Big Band.
Great music.
Extremely wide sound stage.

Album is called Hope, by Hugh Masekela 
but the cd , or SACD if you can find it.
spark one , light a few candles and enjoy this incredible album!!!!!!!
listen to the entire album all the way through .
its a religious experience.
here is a taste:

https://youtu.be/n4Bb7p9gggc

Steve Miller Band Live! Yeah, baby!