The key to more speed in a head wind is more pitch, not necessarily more power.

I've been flying a plane that is the same size and basically the same weight with a 15x10 (glow) and it was enough prop diameter. I had tried a 16x8 and was dissatisfied with the flying speed of the airplane, most notably coming over the top of a loop into a head wind. The Wind is a very sleek design and I have a strong feeling that 16" or 17" diameter props will fly the plane well.

A 10 pitch prop is the absolute minimum I would use on anything this size or greater. I'm going to start out testing a 17x12e and see how it works. I bet the 16x12 with the (light) Scorpion 4025 is an awesome setup.

If you have more speed coming through your looping maneuvers, the acceleration on down lines will be less noticeable. I think this in combination with a good breaking setup will work very well.

I wish the freaking winter would end so I could prove this.[:@]