I can agree with you that you tend to overpower everything you own. But personally I feel that this plane dont need it. There was plenty of people why tried the Saito 120 but the extra weight of the motor didn't go happy with the plane. The .75 should work for general flying, but not unlimited. Personally I think the edge was designed around the Saito 100. With the 15x6 prop the plane will reach for the stars. If you dont want to use the Saito an OS .91 or magnum will be also be a great fit for the plane.
Read up on the thread, great information in there.