Peter, you wrote "I think Raul seems to want his system to reproduce what is on the recording with as little distortion as possible. You seem to want your system to sound like a live music. Those seem to be different goals."
Actually not. At least I don't think so. If one wanted a "euphonic" result, everything to sound "good" regardless of the quality of the input signal, then one has to rely on serendipity; the sound might be very good in one case where the imperfections of the equipment complement the imperfections of the source, or very bad, when the two are in conflict. On the other hand, if you can get the best out of the source, then you have both lowest distortion and best chance to capture the best most nearly perfect rendition of reality that the source can provide, every time. That's kind of what I was trying to say when I noted that if I make a change to a circuit that theoretically should reduce distortion, it usually also makes the sound "better", more nearly like live, more of the time.