Good question, and one I haven’t thought through. My group has a soprano, so I would be playing obbligato. Over the years I’ve become pretty good at playing up the octave on the fly with my alto, but it would be great to play the parts as written. Plus the French flute duets in the origianl keys.
Re the Bressan or Denner, the question is which would cut it alongside a good baroque soprano voice?
Mostly alto, plays with Balmain Baroque