I'm new to this forum so please forgive me if this isn't the ideal place to post this.
A little background. I'm primarily a tuba player but i started out on trombone and euphonium as a sophomore in High School. I played a bach 6 1/2AL for about 3 months before switching to a Bach 5G. I went to college as a tuba major but I've still played trombone and euphonium in brass ensembles and community bands over the years. I play a Schilke 60 when I play bass trombone and love it. I still play a bach 5G on my small bore trombone and marching baritone but I've recently switched to a Giddings Euros for large bore. (All of my tuba mouthpieces are giddings) The Euros as i understand it is similar to a 5G but with a larger backbore. I love it for my tenor trombone and I've enjoyed it on euphonium but I'm looking for something with more depth.
Here is where I need advice. I have been trying to do my own research but I'm getting overwhelmed. After reading a lot about the Schilke 51D I thought that might be exactly what I'm looking for. But... then I found a thread where Doug Elliot commented on how it's a smaller rim than the 5G. To those who play a 51D how is it getting into the low register?
I'm not afraid of large equipment. In fact even messing around with the Schilke 60 on my euphonium it felt great. I loved how great the low register sounded and was still able to comfortably get up to c above middle c. C5? That being said it wasn't the sound I'm looking for in the mid to upper register.
I won't have the opportunity to sit and play a bunch of mouthpieces and make a truly informed decision. But hopefully you wonderful people could help guide me to two or three mouthpieces that I could whittle down to one that I pull the trigger on.
TL;DR: I'm looking to switch to a mouthpiece that has more depth to the sound that maybe has a larger rim and deeper cup than a 5G.
Thanks!