Which should I use?

[ThomasP]

The VW concerto gave me a reason to learn to play F tuba, until I started playing the VW I had only played CC, and BBb in my younger days. Play on what you want to play on, but realize this, most composers learn about an instrument and try to write as idiomatically for that instrument as possible. VW wrote this piece for F, so wouldn't that be the best instrument for the job? If someone wrote a piece for alto saxophone, and the range required in such piece could be played on soprano saxophone, one might say why not play it on soprano? But that's not what its written for. My argument is if you have a choice play it the way it was meant to be played, on F. If you don't have a choice, play it on what you can play it on.