Thank you very much for your help.
sbaugz, I more or less came to the same conclusion you did. Plus I am in Norway and we do not get all brads of motors so I have to think about service and so on. It will be the simple and reliable Zenoah 26 for me, unfortunally my local dealer is fresh out and I just ordered the plane from Tower Hobbies.
This is not my first gasser. I already fly GS aerobatic, currently with an MVVS 45 but that is of course more of a highend tuned motor.
As for conversion, well to me thats a whole other hobby. I dont have the time or tools for it so I think I will leave it to the pros!