After riding all day, my P700 would take it toll on me with all the bump steer.
The power steering reduces the bump steer greatly on stop of the obvious reducing driver input to turn the wheels.
I've had it both, with and with out and I say go for the power steering.
Signature:
QUOTE by Tflynn, "The aftermarket doesn't build what you want? Show them your favorite finger and build it yourself!"