Re: Intermediate Sax for a 7th Grader
If you get a Cannonball, get a new one, the old Excallibur and Knight series horns were not the best. However, the newer horns(Big bell global series) are Fantastics horns. I play the bari. I have a Student on the alto, and its a nice little horn.
The other recomendations you have here are great too.