George. We have just returned from the Seven Night Keyboard Festival UK. I agree with your initial report findings on the Pa800.
As I was looking for a new board I spent every night between the evening concerts on the 800 with my reference headphones...one night 1.5 hours.
As you stated this is an outstanding keyboard at it's price point and the voice sample quality up with the E80 & T2 even at this lower price.
OS v1.5 available May will add a number of additions. Drawbars will be active on the Touch Screen and EQ added on speakers and line outputs. John Pacey the Korg demonstrator already had a test version installed.
Finally I was very impressed so have ordered a Pa800.