I love it when a plan comes together - not only is the Remote Zero a great software (knob/slider) controller, it comes with a dedicated expression pedal out. And, it's less than buying a keyboard (not that I wouldn't want the 61 -keyboard with touch pad and joystick!).
For me, this was is a win-win because it's such an intuitive controller, and because it also solves the expression work-around woes with my existing keyboard. Just thought I'd pass that along.