I would wait for the new BME extreme to come out. They have gone to the trouble of designing their own cylinders for the new engine. We'll have to wait and see if it's as strong as the DA and 3W. Also, the new ZDZ-100 is coming out in September. There should be a lot of good motors to choose from. The BME and ZDZ are targeted to be the lightest of the 100cc twins. The ZDZ will be the least expensive. The BME will have the most displacement at 106cc, the ZDZ the smallest at 97cc.

On the Edge, you'll have to use pull-pull for the elevators and rudder if you want to take advantage of the weight savings of either the BME or ZDZ. Otherwise you'll need a couple of pounds of lead in the nose. My AW Edge balances without lead with the old 7lb bare 3W-100 and the servos in the tail. The DA and new lighter 3W will also require nose weight.