The only reason studio recordings don't use companies like Nordost is because they don't want to change the sound - they just want it neutral. That makes sense. Audiophiles like euphonic not neutral.
Audiophiles like natural sound...that is a misconception....I like euphonic sopund myself, so I do not consider myself an audiophile, but mainly due to the fact that I do not know how the reacording is supposed to sound, so i like it the way I feel is more pleasant for my ears. I didn't make it, neither any of you, so you are IMO chasing a ghost. There is no way to determine how a recording is supposed to sound like (and I say the recording, not the piano, nor the guitar, nor the sax, the recording!!! Which is reproduction of the event, created by a human being wiht personla preferences as well, and full of anomalies introduced all along the process, on purpose or not)