Help needed - choosing a quiver of tubas

[Patrase]

Hi

I am considering what tubas to own. I do 75% of my playing Bb bass in a brass band, 20% teaching (bass clef) and 5% in an orchestra. I plan to also contest in the state and national solo contests (they have low and a high tuba divisions but I will probably enter the high section).

I currently own a pt6 rotary as in the past I was just playing in a local orchestra, but that has changed to the above mix and I don't see it changing (except perhaps to play the Eb part in the brass band, but not likely).

So after months of thinking about it I am thinking the best combo is to:
- sell the pt6
- buy a 5 valve non compensated Bb, such a miraphone 1291 or 191, for brass band (weekly) and the occasional orchestral playing (once or twice a year)
- buy a rotary f tuba for teaching (one day a week) and solo playing

What seems like a winner for me in this combo is the fingerings. Yes I use two different fingerings, but when I need to read bass clef parts on the Bb tuba I can sort of use f tuba fingerings. Well at least I think I can! Correct me if I am wrong! This happens a couple of times a year, where at concerts I have to read brass band bb parts as well as concert pitch bass clef. I don't want to bring two tubas along so it would be good to have some sort of transposing technique

It will be a bit sad to sell the pt6 as it produces a beautiful sound and I have owned for nearly 20 years but I am hoping a non compensated Bb will be a good substitute.

Please let me know if you have a better theory