I did recommend this to someone else locally and he didn't like it!!! so at least maybe you can go and try it.... It is the best mouthpiece I have ever used, at least for me, and it is my main instrument.
Did you think of a Buffett Clarinet? I am not knowledgeable on the Cannonball ones.
Buffet is ok for Clarinet, Also Selmer. I do feel, however, that with selmer you pay much more for name. I have played the cannonball clarinet personally at Griggs Music (http://www.griggsmusic.com). Read the specs. Really beautiful deep dark tone 100% in tune at all times. That guy is over 3 hrs drive away. I will consider him.