I have to second this. My experience has been that jazz recordings and some 70s progressive rock recordings really show off good systems at their best, and with most other recordings the software becomes the limit.

There is one recent Diana Krall studio recording which really shows the speakers off well... Look of Love, I think...

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8