well with any of my .40 sized planes I allways opted for the .46. It just needed the power, that is all.
I am putting together my first .60 plane now and have an evo .61 NT bolted on. Don't know if it will be enough power or not, we will have to see. UUhhhgg, how I hate the engine game. Never can tell exactly what you need unless its a familiar plane.

P.S. There is allways RCU market place if you decide it needs a engine change. I buy/sell there and get good results. people are usually very honest. GOOD LUCK!!