Read this thread on the PA60: http://www.synthzone.com/ubbs/Forum37/HTML/007366.html
Starkeeper

I haven't tried the KN, but I tested the other 2.
I personally like the Korg better, better styles, much better sound.
I have and always have found Yamaha Arrangers (especially the lower and midrange models) sound quite synthetic.
Korg however, sounds to my ear more natural.
I can't help it, whenever I hear a PSR I think "Yuk!, this thing sounds like a toy synth", some sounds are pretty good, like the Live! Grand Piano, but the majority of the voices are .
But then again sounds are subjective, so you gotta choose for yourself.

Greetz ,
Marcel

Wazza,
I think as you, but not at all.
I think Yamaha sounds are ok. I don't see problem on it.
My question with Yamaha is about two things:
1. styles, too much mechanic, synthetic, repetitive drums, not full, not rich. It is as a litlle group is playing all styles, one after other. They don't make me happy playing. Korg styles are fuller, richer.

2. key feel is bad, bad, bad, baaaaaaaaad. It is the worse you can see.

By the rest, good sounds, good harmonizer, good support on the net.