Re: Jazz Saxophone
The Kielwerths, Yanagisawas, Yamahas, and Selmers are all GREAT horns. I also highly recomend Antigua Winds, Jupiter, and Vintage Conns, Selmers, Martins, Beuschers, and Kings.
Any horn will allow you to play the jazz and classical stuff. The horn has little to do with it. It is the player that makes it sound "Jazzy" or whatever the desired sound is.