Hello,

I've seen some comparisons of keyboards, which are certainly interesting.

Thus, a sound:

Korg PA3X
http://www.youtube.com/watch?v=0x3IuIsLhmk&hd=1&rel=0


Audya
http://www.youtube.com/watch?v=834D7B3vh0k&hd=1&rel=0

Roland G-70
http://www.youtube.com/watch?v=Ig5_pus1kh0&hd=1&rel=0

KN 7000
http://www.youtube.com/watch?v=CiXpiiHAhAc&hd=1&rel=0