I'm currently flying my Pizazz with a Tower Hobbies .46 and 12x4 APC prop. It will hover at about 1-2 click below full throttle. Not enought power to torque roll low. It's still fun to fly though.
My OS .91 is in for repairs, that's why I'm flying the .46 now. With the .91 it flew great. You have to add weight to the tail though.