I own a PSR3000 + Korg PA50. During the past seven days we have attended a keyboard festival where I played the Pa800 on my reference headphones every night for the seven days between evening concerts. Some nights an hour at a time which gave me a good insight to how this board performs.

This is of cause my personal opinion, but the 800 is outstanding and is up there with E80 & T2 even at its lower price.
The Korg demonstrator rated it now better than the PA1X with more advanced voicing etc:.
I'm not one to be easily impressed but I have ordered one.