One of our club members has the GA kit with a G45. It is a 20 pound plane. It flies well but is definitely not overpowered. It will do pretty big loops but will not climb vertical forever. I guess it depends on what you want it to do. To fly the basic aerobatics that I know how to do, a G45 would be plenty.

The "benchmark" prop for the G45 is a 20x10 @ 7200 rpm. I do not know if the Fuji has similar power. Of course, there's always the argument that "too much" power really is "just enough."