Hi Jimmy-- I have owned the GP Pitts and almost all of the engines you have asked about. My first choice is the DA50 and my second is a Taurus 3.2 -- RC Ignition G62 and Brison 3.2 a very close third at a lower price. The Brison and G62 is already tapped for smoke with a B&B system that makes the best smoke for the lowest cost. This is a performance aircraft that deserves a performance engine. The extra weight of the battery is far less than the weight of the magneto ignitions of the G45, US41, Fugi 50 and the OS 300's fuel consumption. Just my opinion of course.