I would also buy an APC 12X4 and look at some of the 3-D props if they are in the 12 inch range with an even lower pitch. Prop selection is A trial and error thing until you find the prop YOU like to fly the plane with. I like mine slow with as much torque as I can get out of them. It's an engine/plane/prop combination that you the pilot are happy with.
I also like to over power them just A bit too.
JOHN, I'm rebuilding my old Bridi again and making some changes to it just for PLANE FUN right now. I will post up some photos in A week or two but I have A couple of things on the bench getting covered right now slowing down the Kaos.
Gene