I think 61 sized motors are a waste of time because the extra weight penalty is a lot and it affects the flying characteristic of a light plane. For me a 5 lbs plane will be great fun on a SA82. If not then almost any 46 2C will do, my preferred prop is the APC 11x5. She will definately hang with a TT46 46AX or even an ASP 52 (this baby is reliable and cheap, try it with a nice 12x4 or 12x5).