Ames0325 wrote:How can I know how well a tuba (CC) plays is I am not fluent with the fingerings when I play it?
The fingerings won't really matter a whole lot -- you'll be paying attention to the sound and response, and if you get enough time (a few hours, a week, etc), you'll be able to make a better judgement on things like intonation.
Eventually, you'll find that mouthpiece choice can change a lot about how a tuba plays. For example, the PT-50 that works so well on my VMI 3302 absolutely prevented me from playing a Getzen G50 tuba in tune with itself. A different mouthpiece would have been fine -- I had tried a G50 before with a different mouthpiece and enjoyed it very much. If I didn't have that prior experience, my judgement of the G50 would have been clouded.
On your search, try as many tubas as people will allow you to play. The sheer variety will help you notice all the broad differences between models, and when you get the chance to sit down for a day or weekend and play on one or two dozen horns, you'll be able to decide within five notes whether you like a tuba.
When you get down to three or four candidates, and you really enjoy all of them, it's time to get really picky. That's when all your experience -- or your teacher's experience -- comes into play.
ALso I am discovering that altough my school is a very good school particularly for music education students it is not going to be a very good school for a tuba perfomance major--
My college pretty much sucked compared to more performance-oriented schools. The tuba studio wasn't really large enough to be its own entity (probably three of us, really), so we had a low brass studio. Worse, our low brass professor was a trumpeter of semi-average talent. But, he was motivating, and tried his best to get us moving along. Us students also took in as much information as we could from other sources -- recordings, books, other tuba players & professors, etc -- and we worked on constant improvement in spite of our surroundings.
Now, whether it worked or not, I can't really say.

Just know that, even in the largest and most successful tuba school, it's still going to be up to you to produce results.