Not for sure about the Graupner super Air.
But the sig 4 star 40 or the sig 4 star 60
would be a good choice. Both can be bought
as kit and the 4 star 60 can be bought as a ARF.
I built the kits for somebody else but i have
flew them both and they fly very nice.
May one day build one for myself but the sig
somethin extra is quite a bit more areobatic and
its my fun plane for now. The smith mini bi plane
that i have gets a lot of stick time too. LOL