Ma 12x6(3)
The new EFlite line looks excellent. Try the 13x6. It's working excellently on the two engines/airplanes I've tried. If the engine won't swing it, try the 12x6. (This new line isn't in every LHS.)
The TopFlite 13x6 PP works really good on my 60s.
The Zinger 12x6s seem a bit light on my 60s, so you might try them if the above are turned slowly by your 60s. It these seem too fast, try the 13x6s

If any of these seem to make your airplane too fast and especially too fast on landing, try 5" pitch props. But expect to need more diameter.