...only way, from what I understand from my studio experience, to get a "realistically reproduced soundstage" is to mic the players and then set the mixing controls relative to the mic placement, relative from the point of the single listener.
So, if you mic'ed them like this:
\ | /
(where the lines indicate direction)
you'd set the pans for those mics relative to the way they point, amongst other things. This is why, from what I hear, classical music has much more "actual" information than does, say, a pop record, where you'll get weird, way-too-upfront positioning of lead vocals, auto-panning of percussion or vocals, weird placement of closely mic'ed (or directly mic'ed) instruments (like an electric bass guitar being directly mic'ed) mixed into a "distant" or low-volumed (so that you get no real "wetness" or reverberation, just the straight sound into your ear...essentially giving you no additional placement info to "locate" that instrument with, thus making it sound like it's coming from the earcup).
If, on the other hand, a rock band just set up some nice stacks and mic'ed them and mixed the mic positionings properly relative to one another from a single point of view, you'd get the room clues you'd need to form an "image."
There are records that I have of techno acts who use "lush strings" or "wet cymbals" and other such effects, and while they do extend out away from me as the sound decays, it feels very artificial. So that would be depth, but not really depth that constituted a real, organic "sound stage." I find I'm hard pressed to get pop music with a non-phony sounding sense of soundstaging.
- Sir Mister Matt