Can not really comment of the RCGF, only because I have never run one, but from what I have heard many folks are running them and like them. I have run the DLE-20 and you will most likely get some good comments on the DLE , as their are many being run.

My personal opinion if I were opting for a beam mount, the DLE-20 would be my choice. I do have a OS GT 22 which is also a beam mount scheduled to go into a Seagull Space Walker. As I stated the OS is also a beam mount, but their is quite a distance in pricing between the DLE and the OS.

If you chose not to go with a beam mount, for that size model, I might also opt for a DLE-35 . With the DLE-35 you would have plenty of power for the models mentioned and a good engine for a future model.

Would like to add that I don't believe that you can ever have to much power for a model. In the past I have mostly every time built the model with a larger than required engine. As I know, we have throttle control and very rarely do I need to fly a model at full power.

But then once again, these are only my " personal " thoughts and replies to your info request.