I also have this plane. I went with the rimfire thats recommended. According to the great planes rep, an 11x7 E prop works perfect.
Its one of the prettiest covering jobs I've seen. Great color combination. The control surfaces are very large therefore, not much
deflection is needed for the plane to rip up the sky.
As far as expo to use, I'd start with 50%. I have the futaba 9c so I can blend in quite a few settings.
I also asked the rep about the landing gear. Basically, I told him why do model companies assume that everyone flies
off of a paved runway? There are many of us who fly off of a grass runway. He assured me that the wood structure was
much better than previous models. We shall see. I only use at minimum 2 inch foam wheels because smaller diameter ones
get stuck on my field.

Lucky...