A very informative review, Steve, and very similar to one that a friend of mine sent me on Saturday.
He is also a Tyros user (a T3), and he was also very impressed with the Korg's layout and build quality, as well as the great sounds and styles.
Like you, he wishes he had an instrument
combining the best qualities of his Tyros
and the PA3X.
It is nice to see the PA3X get the attention it deserves, particularly after such a poor launch, and equally dismal initial demos.
Competition between manufacturers, especially at the top of the range instruments, is tough on the companies, but marvelous for us players...also, hard on the wallet in some cases.

Thanks for sharing your unbiased views.
Ian