If you really wanna do 3D with that engine, the only good choice to get the power to weight ratio you want is a profile. The Accel Katana 40 was already mentioned but OMP has 40 size ARFs, Edge and Yak. The Edge is widely known as one of the best 40 size 3D planes out there...

And if you think you don't like the looks of profiles, don't worry, when you see your profile doing rolling harriers and rocketing out of a tail touch, you'll love the looks of it....