RE: Vectorflight Edge 540 engine choice
For what your wanting to do, I dont think you could go wrong with any of those choices. I have a Saito 1.20 in mine and it is very strong with this plane. Maybe too strong. The Saito 1.0 or OS91FX would probably be more suitable choices for this plane given it's flight characteristics. It is not a strong 3D plane, but is very strong in the IMAC style of flight. After just a few flights, I have found it easy to learn the Basic IMAC routine steps.