Whoops. I forgot to comment. I am scanning again so I can't take too much at this time to comment, but here is what I have to say about one of the photos
the original
2 secs of the spot healing brush on the right hand side removed three large, distracting spots. Which can be seen in the original. There is also massive artifacts on the left, which I have marked. They are also around the stem, leaves, etc.
As can be attested to in my other critiques, the thing that really drives me crazy is spots. They are easily removable and so distracting. When I see a picture with them they are all I see.
As a personal preference I have no interest in concert photos, so I won't comment on those. I would say your strongest photo is the one of the horn player, but it is noisy and there is artifacting. I wonder if you could possibly give some details of how you are shooting these and what you are shooting them with.