And my two cents regarding the best saxophone would have to be the Yamaha Custom Z. I have a black laquer because of the warm tone, but any of them sound good. My professor even has a gold plated Z. They work well for classical and jazz, they seem more in tune than many horns I've played, it doesn't feel small like the Selmers, and it has the concave pearls that I like.
And best mouthpiece for classical has to be the Vandoren Optimum. Idk why you'd play on a square chamber for classical. The optimum's just sound better, and are way more in tune.