Many cuts rotate in and out of my list but here are some mainstays:
Oregon: "Leather Cats" for bass and wild dynamics that are all over the place. Chesky SACD
Valery Joyce and her arrangement on Chesky records of Jimi Hendrix' "Little Wing" for female vocal.
Couunt Basie with Ray Brown and Louie Belson on the 180g 45 RPM reissue of the 1973 "Count Basie 3 Kansas City" for jazz trio, bass and piano. Pablo Recordds
The English Chamber Orchestra with Daniel Barenboim on EMI CD: Mozart's Piano Concerto # 21 for orchestral subtleties, dynamics and piano
Diana Krall's arrangement of Tom Waits' "Temptation" from "The Girl in the Other Room". Bass (Christian McBride), female vocal, jazz guitar (Anthony Wilson)
The Afro-Celt Sound System "Whirly Wheel". Huge dynamics and pounding percussive rhythms-great test for how well your amp(s) are controlling your speakers. I can easily get the LED's blinking red on my 7B SST2's with this one. In fairness to the 7's, my speakers are dipping to .8 ohms at several spots in this recording.
Al DiMeola from his 20002 SACD "Flesh on Flesh" an electro-funk arrangement off Chick Corea's "Senor Mouse" Just a really fun arrangement to listen to.