My father took a PA2X in part exchange for an Audya from the musical director of a major venue in the UK. I was very excited to have chance to look at the Korg as I have always been a big Korg fan, but having the two together on the same keyboard rack through the same PA I found the Korg a bit of a dissapointment- mainly becuase of the midi drums. Its beautifully made though. When you have an audya in front of you its so difficult to listen to MIDI drums which are important for me, and the only reason I started to play an arranger again.
The demo's are good - but unless you have the instruments side by side yourself they only tell 10% of the full story.