What do you think the best power/drivability combo is?

Fun to drive? Hard to beat the throttle response of a roots supercharger. That and the torque down low can get you in a lot of trouble. And what power adder does Dodge use on the Demon engine? No snails there. A belt driven positive displacement supercharger. And I believe chevy and ford do the same with their top hp engines. Of course your idea of drivable might be different than mine.