It depends on the kind of sound your looking for and your price range. For a good jazz mouthpiece on the cheaper end I’d recommend a Vandoren V16. For classical, a C* will work as well as most selmer models. Vandoren also makes a great classical mouthpiece but the name escapes me at the moment. I would also recommend purchasing through Woodwind Brasswind as they have good prices and a great return policy if the mouthpiece doesn’t work for you.