Scott;
I respect your opinion on the Kn5000 - you would know best of all what your needs are in any particular keyboard.
Regarding the X1 - it has certain remarkable characteristics - and for an experienced professional - perhaps - you could borrow one and do an A\B test comparing it to your KN5000 - I'd like to hear your opinion on that.
As far as exchanging styles - almost all the Kn5000 styles are available and playable ( very well too!) on the X1.
Unfortunately I do not think that there is yet available a program to convert X1 styles to the Kn5000 format.
It does not have the same characteristics as earlier Solton models.
Jerry