One more vote for the Selmer S-80 D.
Also, as a cheap option, the Bari Esprit is a surprisingly GOOD mouthpiece for modern sopranos. Far richer toned than a Yama.
For my tastes, the Vandoren mouthpieces are too bright and edgy. Not in a jazzy way, but in a shrill way. That is probably variable such that you could make it less shrill with a different kind of reed, and with voicing and padding the reed. But generally speaking, I am not a fan of the Vandoren mouthpieces. I use their reeds for a starting point, altering them to play for my set-up, and I love their reeds, but they do require a lot of work, at least where I live (dry, warping reeds boat-like, which breaks the seal). I find that the Jody Jazz DV series work well with dry climates. Because the table of the reed can warp a little, boat-like, and it won't break the seal, because of the giant window that leaves nothing for the table to push against.The soprano player in our quartet is very happy with his Vandoren V5 S27. I haven't seen any mention of Vandoren, does anyone have any experience with them?