I would have a couple of questions about your choice of instrument. First, what is it that has given you the impression that some teachers might question your qualifications if you choose the Yamaha instrument. And second, what is the process by which you have selected a particular brand of bassoon in advance of being able to play on the one you will buy?
This is not intended to denigrate the Yamaha brand. Many fine bassoonists use them, particulary the top-line models, and are happy with the results. I have played on examples of Yamaha bassoons, as well as all other brands exhibited at the IRDS conferences, for the past 15 years or so. I also played on the Yamaha prototypes many years ago - serial numbers 1 and 2! I always liked the sound and response of the Yamaha bassoons, but in the early days, their keywork didn't feel very comfortable under my hands. In my opinion, that has been improved immensely in recent years.
I think that what I am trying to do is to urge you to be cautious about making an arbitrary decision about what brand of instrument you will purchase. If you have some idea about where you might be going to college, it would be a great idea to get some input from the professor of bassoon at that school, particularly in view of your concern about how the brand name of your bassoon might influence people's opinion of you or your choice.
University of Evansville