I am currently playing on a Shilke 14A4A for everything (jazz band, concert band, lessons). I am in ninth grade and have been having trouble with endurence lately. I have been using the 14A4A for about a year. I want to switch mp's at least for concert band. I was reading about the 14A4A and how it is not that great for young players. Are there any other mp's I should avoid at this point?