Well I made the decision between the pa800 and the s900 and am buying the pa.

Although I did feel the s900 was more usable stylewise out of the box the features
and extras plus the upcoming new operating system led to my decision. I might consider buying the yamaha later if my forays into arranger playing work out financially. A lot of my decision had to do with being able to use the pa800 as a workstation in my studio as well as play live.

My thoughts

korg organs, drums, harmonizer, voices, guitar mode, strings all vastly superior

bass, brass, woodwinds, pianos similar depending on taste

yamaha lead guitars probably superior

super articulated sounds are very nice in yamaha

I felt both boards lack in some guitar sounds such as jazz, clean overdrive

Found extras in the pa such as would be in a workstation i.e.drum family volume - routing separate drums to separate outputs (very important to me as I want to record each drum separately and adjust volume later)

Anyway I felt I had to have the korg and love playing it. I also liked the fact few of these boards have been sold in this area ( Winnipeg Man) giving me a chance at sounding a little unique.
I hope I can find or create a few missing styles. More 60's rock, more motown, soul and blues and some singer standards from 40's 50's. Can anyone tell me what the bonus styles on the korg site are and how I go about downloading?

Thanks for your input and kind words

Don Adams