Matt,
i'd find a bunch of piano recordings and listen to them, then a bunch of vocals and massed strings or massed voices. these are where digital has a bit of trouble in sorting out detail in the massed strings and voices and the sustain and continuousness of the piano.
it's where the MSB Select II separates itself from others.
not sure it will work that way for the DaVinci and Boulder, but it might. it's the ease of getting that analog rendering of the whole note.
ideally in the system where you have a turntable or tape deck as a reference with the same recording. but even without those piano is the torture test.