I agree with Zuki on all points, I had the PA800 and liked enough to upgrade to the PA2xPro.

The thing I miss most and probably the only thing I miss from the PSR3000 and Tyros2 is the number of 3rd party styles and support available for Yamaha keyboards. The Songbook feature is fantastic, but from your description on how you'll use an arranger the S900 sounds like it may be better suited to your needs and $1000 extra bucks in your pocket could come in handy.

[This message has been edited by Stephenm52 (edited 06-28-2008).]