Honestly, I find that what you are seeking is just the opposite of what live music in most venues sounds like. I am always amazed at how, except, obviously, for solos or one section of the orchestra playing on its own, the sound of an orchestra is way more homogenized than what audiophiles seek. Rock, or other amplified music for that matter, is the same for another reason: the homogeneity comes from the fact that everything comes out through the PA system.
Seems that on the road to the absolute sound, people keep forgetting what the real thing sounds like. What strikes me more as missing from recorded music are the speed, airiness and dynamics of the real thing. My youngest daughter started drumming about a month ago and I can tell you that no system has the slam of a real bass drum or the shimmer of a real cymbal.
The only music that makes sense to experience as the it is here in the room notion, is anything that could actually fit in your room: a solo piano, a trio or quartet at most, a folksy singer with guitar accompaniment. Anything bigger and you have to give that up,
