Well, you are limiting your choices if you plan to use your 40. In that case, a SPA3D may be a good choice (design it with a 32" wingspan). The flip may be also (I saw one fly with a Saito 56).Personally, I don't see how the SPA3D will be any different that what you are flying now. I cannot think of another plane that will suit your request.

However, there are several 40 sized planes that will fly with a 40 sized engine, but will not 3D. You will have to up the power (usually shoot for a 2:1 power/weight ratio for 3D), then your options are numerous.