TubeNet

I read a lot here about which horns you all use for this group or that group, not much on your solo horn, so here's the question - when you are fronting the band or orchestra or other setting, which tuba is your horn of choice for solo work, and why? As a sub-question, if you (like me) generally do it all with one horn please state so.
Mainly, I'm just curious; on the other hand, I'm tucking this info in the back of my head re: a future probable purchase.
Thank you for your time,
Tim

All done with two three valve horns. Concert Band with 50 plus members, recording bell tuba. Concert Band with 30 members at most, Boosey & Hawkes upright piston valve.