As a newly invigorated Clarinet player, I have tried several clarinets and my favorite is a Series 9 paired with a Clark Fobes SF mouthpiece after trying at least 10 other mouthpieces.
There is really no place to try different horns esp these days, but I did try other 9's and Bb and A 10's as well as a few others,
and the nine I have projects well and plays in tune, so I'm happy.