I just saw the BME 110 in action on Todd Blase's Cap when I flew in Waco last sunday. It only weighs 4 something pounds. He was running a 27-10 prop on it. The owner of BME was out there also and I got to talk to him.

Since you will probably be concerned with weight when thinking about such a large engine in a 33% plane, the 110 would be great. Just have to wait until it is available for you to buy.

If not the ZDZ 80 would be good too.