I recommend using Benny Green's "Testifying", track number 8 - "Down By the Riverside." I used this cd at CES 2002 to test many speaker systems and I received many favorable comments from exhibitors (many exhibtors wanted to buy this cd, even Jeff Joseph from Joseph Audio went out to buy this cd the same day he heard it). Let me tell you, Track 8 has many dynamic swings that test speaker systems to separate the "men from the boys!"
Which CDs to test a component?
What CDs do you like using to test new components?