If youre serious about really learning 3D, follow the advice given and buy a Profile. May not be as beautiful as a full fuse plane but for sure are the best tools for honing your 3D skils. Any other kind of plane in this size will not help you to 3D.
An OMP bird like the Fusion 52 will give you a very rewarding practice time and will sustain more small dork than any other kind in this size.
You won't regret after the first few flights.
Saludos.