I've played the:

Ketron SD1+
Korg PA1X, PA1X Pro, and PA800
Yamaha S900, Tyros2
Roland G70 & E80

Though I agree with Mikey on some points, but not on others about the PA800, I feel ALL of the above keyboards I've played are terrific keyboards in their OWN right, and capable of sounding the way you want (if only you take the time to because master the OS, navigation, sound editing capabilities of the board, of which then gives you the ability to make the keyboard your own and sounding just the way you want. Unfortunately for some, this is'nt possible in a week, or even a month, and full mastery may take much longer.

You can nit-pic about this feature and that, but the bottom line is, like the techique & art of keyboard playing itself, it's all about putting in the time (woodshedding) to master the many features of these powerful technilogically advanced keyboards. If you don't have the time to do this, dedicatication to a single solo instrument may be better suited. Just my opinion. - Scott