I will go with others in saying that the Aeromaster is 'most likely' a step too far. It might just be OK but with that planform and rather thin looking wing section these can be prone to tip stalling at low speeds especially if on the heavy side. I would keep it as a third model.

Buy a stick or something like a Black Horse Speedair and go fly the snot out of it until you are confident you can handle something hotter. Even then it is a real good idea to get your instructor to buddy box you on the first flight or two.