Best speaker/system piano concerts

Snell Type AIII's are a forgotten classic design still competitive with today's big-buck speakers! Dead-flat response (+ and - 0 db) from 30 to 20k and wide dynamic range. Plus textbook perfect off-axis response! Lowest coloration possible from a dynamic speaker!

wow, I think we all did more harm than good at this point.  With speakers, I have noticed that there are sometimes going to be 12 different opinion on what is best. lol.  sorry.

The soundboard of a 6' grand is about 25 square feet. IMO, to reproduce that believably takes a comparable radiating area.

That leaves big planar speakers or big planar speakers. I use Quad 2905's. Amplification is full complementary class A solid state from MC to speaker.

I get best results from the 0.25mV MC with active amplification rather than transformers, even the very best, which I also have. Piano also requires a very low load = high input impedance at the phono = 47K.

Even so, doesn't quite sound like the grand upstairs.

Great piano reproduction by any system becomes evident when you notice that all recorded pianos sound somewhat different from each other.

Without going into wordy sonic descriptors I would go with Focals you pick the model based on budget along with Pass Labs amplification preferable something in the XA series.  

Chuck