Hello
This is just my opinion, to my ears, no offense meant to any Korg lovers: The PA60/80 built in piano sound is very harsh and unmusical, as is most of the sounds on this KB. I prefer my PSR2000 and certainly the Tyros. I tried them side by side. At one time I thought I wanted to get a PA60/80, especially after hearing the great demos on their site. Only problem is, it doesn't sound like that playing live, or I sure as hell would have bought it. BTW, the dealer let me try it in my home with no money on it, and wanted to sell it to me for dealer cost which is $960 (for the PA60).
The guy at the store explained to me that Yamaha has great instrument sounds, where the Korg has great synth sounds. (He owns a Triton and a Yamaha (Motif I think)
You asked. Sorry to be blunt, but thats my honest opinion.
However, I look forward to hearing Korgs new board soon to come out. But I still expect it to sound like a Korg.
In the end, though really, if you like the piano sound on the PA60/80,then follow your ears, but only after doing an extensive comparison. This saved me from making a big mistake for me.
Best
Scott Langholff