Being a dedicated helicopter flyer my self, why not use, as stated, collective pitch tail rotor blades in each wing, with both blades being belt driven by one dedicated brushless motor in the middle of the plane, along with one (or two) servos to control the pitch rod for each rotor. It would be fantastic.. .

This way you get instant response time without waiting for engine spoolups, not to mention you use less power all around with more thrust per unit.