I was not aware of these viola concertos until hearing the one by Stamitz on Sirius/XM. The sound of the viola in the Stamitz is just wonderful and moving, coming from a contemporary of Mozart. Such a pleasant surprise full of virtuosity and pleasing sound. I've been collecting recordings of the few viola concertos that exist and these are already among my favorites. It's not often we get to hear a well-played viola in such an attractive role with such outstanding sound quality.