Yes, you should ideally test audio equipment in your own home. However, that is not always possible. If you were to demo equipment remotely and had to limit yourself to just 5 tracks, which tracks would you choose and why? I try to do exactly that.

0:00 - Start
2:03 Flamence Sketches
Miles Davis
Kind of Blue
5:32 Afro Bossa
Duke Ellington & His Orchestra
Afro Bossa
7:47 Sweet Little Woman
Carey Bell
Harpslinger (30th Anniversary)
9:30 Tell Him
Barbara Streisand & Celine Dion
Higher Ground
11:07 Wake Up
Rage Against The Machine
Rage Against The Machine

Classical alternative:
50 Greatest Pieces of Classical Music
London Philharmonic Orchestra