Learsfool, thanks for the thoughtful response. Unfortunately, however, your guess was wrong -- I am particularly interested in achieving the results I mentioned in the very areas that concern you, "the human voice, or other acoustic instruments, such as a full symphony orchestra". I have experienced one of the world's most respected classical guitarists playing on a couch opposite me, my brother blowing on a saxophone full bore a few feet away, and a time listening to a big band in full cry, where I stepped around the typically hopeless PA setup, and stood right next to the front side of the low stage, only a few feet away from the trumpet and trombone, etc. The latter experience was magnificent, effortless and massive sound; as a test, I "shouted" at the top of my voice during a dense passage, but could not hear myself at all, while the sound from the instruments was effortlessly enveloping and flowing over me, fantastic stuff. This level of reproduction is my benchmark ...
All those deficiencies you mention can be there in setups, but, and sorry, "distortion is distortion is ...". A very key point you make is "analog has more surface noise - but this type of distortion is not embedded in the music itself, and can be listened through". That is exactly the principle that I use for making digital playback (which is what I am using exclusively) work properly. Yes, the type is distortion is "different", but can, and I repeat, can be reduced to the point of being effectively, musically, inaudible. This is nothing to do with readings someone has got on a distortion meter, they are about as useful as saying a car has been measured as being capable of 100mph, for picking which vehicle is superior on the road!
I have certainly been able to enjoy, on a digital setup, the famous climax of Beethoven's 9th with the impact I mentioned earlier, and at the other extreme, the earliest recordings of Melba, 1910's or so, and the ambience and realism of the piano accompaniment in the distance delicately and convincingly captured ...
Frank