Quick followup, I decided to go with a .45 size WM Mustang for now. This will save some cash because I can put my K&B .61 Twister in service. I think this will be adequate. The plane doesn't have flaps, but does have retracts. I briefly considered using flaperons, but the feedback I've gotten is they are a bad idea for this type of plane. I guess the flaps will have to be done some other time. I added a .45 size WM Cub to the order and still spent less than I would have if I'd gone with a .60 plane and .91 4 stroke. Thanks for all the input, I'll file the recommendations away for the next round of purchasing.