I too find myself listening to well recorded songs to hear my system. Percussion is a big thing for me.
You might listen to these songs to hear what your systems are capable. These are high quality recordings:
1. Girlfriend (Feat, Dam-Funk) by Christine and the Queens
2. Lights on by Maggie Rogers
3. The River by Aurora (ADifferent Kind of Human
4. Chocolate by The 1975
5. Kiss in Blue by Yello
6. The Expert by Yello
7. Watermelon Man by Herbie Hancocks 1973 Head Hunters Albumn