Also from what I've heard thus far, the sound of a saxophone is probably the most difficult for a KB to reproduce ...
TO ME, the nicest sax sound I've found on a KB is the 'Soft Latin Sax' on my Kn6000 - again JMHO
Agree Tony, especially without a breath controller. The 'sax' I favor is a slightly tweaked one from my ancient PA1xPro. The one from my (also ancient) Tyros II is probably better but I find this one more 'playable'. I made a quick clip to demonstrate. Tony, you're old enough to appreciate this old tune

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https://app.box.com/s/mvx7i1pp3rj48m9czdwuxayu9i5jpvm9chas