I just got my PA1X Pro and after playing it for about an hour all I can say is WOW!! This thing sounds and looks amazing! The key feel is awesome and the built quality is 10 times better than PA80. The colored touch screen is easy to use and the volume sliders are very handy. Most of the styles are from PA80, but they sound much better.

I didn't get a chance to play it too much but one of the complaints I had with PA80 was with the fills not timed correctly and when I switched from Yamaha PSR to KORG PA, I kind of missed the tight fills that Yamaha had. Looks like Korg has finally fixed the issue with fills. Again, I didn't get much time to check all the styles out but the ones I played sounded perfect.