As far as the solo sounds go they are typical Korg, with the Exception of the DNC Violin, Strings & Acoustic Bass which really are top notch and easily leave the Yamaha SA1/2 voices in the shade.
Bill
Of course Bill, this is your
personal opinion, and not indicative of a
universal sentiment. It will also depend on just how playable and expressive these DNC voices are when playing "live".
From what I've heard on these latest demos...the Tyros4 still leads in this area...my personal impressions, of course.

Ian