Re: Buying a new saxophone
I would give Keilwerth SX90s a shot, too. Of those that you mentioned, I've only actually played a YAS-62, a Reference 54, and a Cannonball Big Bell, and the only one I wasn't that impressed with was the 54. Another good brand to try would be Yanagisawa. I played a 991 a few years ago and liked it.
My best advice is to try out all possibilities, and choose what feels the best to you. Also consider price! Good luck in your search!