sycc you're not a JK fan, I'd just send the horn back and make due with what you had before you ordered the JK.
A rampone is a totally different animal. It's a nice horn, looks sharp, it does have a big bore, and the neck shape is of the low arch type so the response is tough on the high notes. It's also got a few intonation problems, but those can be over come.
Saxophones just aren't as elegant as they once were, nobody is doing the engraving like they did only a few years ago. Rampones are nice looking, they do have cool engraving, but you're going to have a time finding one to trial. Most of the guys selling them sell with a no return policy. Also remember saxophones aren't jewelery, they're tools.
Honestly if you want a great horn then why not get a Selmer Ref or if money is an issue then a nice Yani.
Don't hold yourself to the big bore instruments as the Rampone is going to be tougher to play the SX90 at least on the altissimo.