When I really want to impress someone, or just remind myself just how good these speakers really are, I pop in Hotel California off of the live Hell Freezes Over Tour CD. It always puts a smile on my face and sounds good even when played really loud. I think it would make an excellent auditioning CD.

M60's
VP150
QS8's
HSU STF-2
Onkyo TX-SR805
Audiobytes for the PC