Casio CZ/ VZ/ FZ - Pro Series

That was one thing that Casio definitely got right...two assignable mod
wheels in addition to the pitchbend. All keyboards should have that....well
that and a vector joystick too. 
What's really surprising is that those expensive controller keyboards almost
never have 2 assignable mod wheels. I never understood that. That's the
biggest reason why I've never spent  the dough on a nice controller
keyboard..they don't have that many good control features.