<It would be great to have a few soundboards w/just bass, drums and Keith's guitar in the mix. His sound was a little muddy on that tour, maybe because of the obscene volume the music was amplified to.>

I suggest the Pittsburgh '72 soundboard. I call that recording a basic Stones 101 in guitar playing. There is almost complete separation of the guitars in the left and right channels. Want to hear Taylor without Keith? Or vice versa? A perfect recording to dissect what is being played. Good for you guitar players to play along with, too. Do you want to play along with Keith or Taylor?