I'll second the Buescher True Tones. The Conn New Wonder Series II straight sopranos are also very good. The earlier New Wonder Series I curved sopranos tend to have some intonation issues. Martin also made a great soprano.

Martin Handcrafts have a great sound. Well worth trying out.

I bought my alto and tenor new in 1966, but I guess they are considered vintage horns. I bought a 1962 soprano this year, which is the first used horn that I ever bought. I sent it to Paul Maslin in Chicago to shake it down. I paid four times more for the soprano than I paid for the alto and tenor together. I started on a buescher in 1959, and my family doesn't know what happened to it. It must be in someone's garage. I don't know much about horns, but i've had Selmer for 40 years. They do anything that I need to do.