I tend to use recordings of music that I have frequently heard live. Since I have heard the Chicago Symphony live hundreds of times I use the Reiner (Classic Vinyl preferred)and Solti performances of Bartok,Reiner's Sheherazade, Solti's Mahler 8th and the HP remaster of Ozawa's Rite of Spring. These pieces have solos for most of the instruments and voices as well as massive tutti's. Vaughn Williams Symphony Antartica is a favorite for low bass with orchestra.
Music to test systems
If you were going over to someone’s house to evaluate their system and you only knew it was a high end system, what 5 LPs (if you are into vinyl) and 5 CDs would you take and for what purposes (test bass, imaging, soundstage, etc.). I have thought about this a bit and have not yet narrowed down either to just 5. I will post my answer once this thread gets going.