Mapman, I had an experience last night that suggests we have not gotten everything we can out of recordings. Involved was the Sinatra and Basie at the Sands recording. I had gotten it to be very satisfying with improvements in my system over the years, but not to the level of my vinyl.
I got in a prototype of a dac by Exemplar Audio. After two days of break in, last night, I had a very great improvement in what I seek always, realism. I could hear Sinatra moving around, could hear individual instruments in Basie's band, and could hear the audience's presence even when they were quiet. I was thrilled to say the least. I cannot say yet much about this dac, but I will not be really expensive and it uses tubes in the output.