Don
I feel exactly just like you.
As Andrea gave me an advice, I will have the opportunity to go and test the Korg Pa3x and Pa900 next week.
Why do I have to go listening to Korg when I am really satisfied with my tyros ?
Fact is I never get enough having new styles, sounds ... and it is not because I'm not satisfied with my keyboards actually.

Exactly when I bought the M-audio little keyboard and use A.I.R Ignite with my Tyros 5 to play melodies. Just for fun because I like it, so my friends keep asking me :why do you buy the top arranger from Yam and want to test other sounds ?
It is not because I don't like the sounds on the Tyros 5 but only because it is a little challenging for me to test and see , I'm too curious. And the results are great.