I agree with the one post about building up more gradually on the plane. A typical 40 size plane, with a 70 class four stroke, puts around $500 (some less, some more) in the air. The giant SS will at least double that. Everyone has different limits but I’d be so afraid of crashing that I could not enjoy the big plane.

As for radio, definitely go for the one you want. The 9303 you listed should cover all of your needs for a long time. The servos that come with it will work for the majority of 40 and 60 size planes.