Well, as some of you might know, I've just purchased a PA60 (Korg) a few weeks ago, I also compared it to the PSR-2000, IMHO the sounds are better on the Korg, So are the styles.
But the Yamaha has more features, Easier user interface.
The Korg is a lot more complicated, Has better keyfeel, better sounds & styles (IMO), But less features.
Also the Ketron XD9 is a fantastic machine with some of the greatest sounds and styles I've ever heard, But here in Holland, The Ketron is pricier, About $400 more than the PSR-2000 and PA60.
That was my POV.

Greetz ,
Marcel