RE: How should I upgrade?
You may not like this, however the Parkzone P-51 is a AWESOME bird. Pretty quick and flys great. No rudder, but you dont use much rudder on a Mustang anyway. With moderate skills, anyone can look like a pro pilot with one of these.
I am a 3D pilots and got one for my son. I have taken it from him. Several of us now have them and we pylon race and combat them, bone stock They have much better performance then anyone expects.
180 bux, can't go wrong.