RE: Spot On 50 Build log.
For me the Saito is the best option. If you don't have enough money for a new one, here in RC Universe, you can get a used one for less. I think that the Evo .61 is going to be too heavy, I'm Using a Saito 82. 17.6 oz and I needed to add some weight in the tail (about one ounce). With an Evo .61 that is 25.44 oz you're going to have to add a lot of weigth. In that case I think that the new Evo .60 even though is going to be less powerfull (I guess) the weight is almost the same as the Saito .82 and the power/weight ratio is going to be better.
Just my 2 cents.
Happy Landings