"That's not fair

- How many speakers can do a piano justice without costing a good bit?"
Well, we're here to improve audio quality, right?
"I guess my point is, you really need recordings you yourself are intimately familiar with. Even then, listening to them through speakers can form your opinion of timbre so it's not always a good thing to use recordings you only know from listening to speakers."
I understand your point but through different speakers, we can only become familiar with that performance
through those speakers, unless the speakers we audition sound amazingly similar.
It's an eternal paradox. They're recordings, so the only reference you have for their accuracy is the recorded material - not the live performance. Yet great speakers might make the recorded material sound dull and weak speakers might make it sound live - is this the goal?
It's tough to say.
"That's why I think, while auditioning speakers is important, you need measure
ments to verify what you're hearing. Was it the room that sounded great or poor? Was it the speaker?"
Exactly- if we listen to music that we haven't heard before, we have to stop ourselves from concentrating so much on the performance and listen more to the sound, but IMO, what we use as source material needs to be something we can understand, musically. If someone who only listens to mainstream music is made to listen to avant-garde jazz, it won't go well. Definitely a paradox.