Love my Shilke 52D. For euphonium playing it's great.
Unlike the trumpet players who have a different mouthpiece for every note on the horn, my professor's whole studio plays on them.
Used the generic for M-band my freshmen year when playin Blessing Horns. Switched to my "concert" mp for the next season and I had a totally much bettter TQ. Could get loud and it wasn't gross.