I agree no wow factor with the Korgs. I'm sure there's some great stuff on them but, really even these demos don't show much. I would want to hear more of what the keyboard does than some guy pounding out a bunch of his variations on some of the few sounds we know are ok.
I still have a problem with their piano. It sounds kind of tink, tink, tink when you go an octave or two above the midrange. The flute still has that funny sound in it. And that trumpet, you've got to be kidding. Yuk
The other thing, Korg doesn't have the 1-8 registration memory buttons do they?
I'm sure it's great for some folks, but I don't think I will be one of them.