Kangke Cap232-120 I had one with a 35CC RotoVi and it flew it well but was somewhat underpowered for my tastes. Landed nice and slow and none of the bad snapping tendencies of a Cap. I used 5945's all around and they were way overkill. total plane weight was right below 14lbs turning a 20X8 bambula prop

I also agree with the H9 Extra. Try any of the 28% planes over at Wildhare. They are all built around the DA-50 for nail biting 3D stuff so a 40CC should be just fine.