Home At Last from Steely Dan's Aja CD. (Yeah I know, "eww, CDs". I hate them myself.) It's a very uncluttered mix of expertly-recorded percussive instruments (bass, piano, drums). In my experience, if you can reproduce those three things everything else falls into place.
You hit a home run with this recommendation. Steely Dan, not my favorite band, were absolute studio perfectionists and made some of the best recordings in history. They would not play live for decades because of their desire for acoustic perfection.
Piano, bass and drums - cymbals especially, if you can do those, your system is mint.
The record is not bad either if you want to test your system back to the cartridge.
If you are a guitar lover, then try Dire Straits Sultans of Swing. Pure pure tone. And tubes make this particular song sound better.