Favorite song to demo or test drive speakers?

Apparently classical listeners never get new systems.
For my last upgrade, the Druzhinin/Muntyan recording of the Shostakovich viola sonata that I ripped myself from a virgin Melodiya lp.  Some of the Bostridge /Ades Winterreise, and a Mahler symphony (maybe 5?).

Why only speakers. Got a new preamp hooked up today. Listening to Art Blakey 'Moanin'.
I could go on.

@mickeyb   The Church and Crimson       Yes sir !          awesome

Gimme Shelter