So I am looking at building and flying a new plane since I am bored with my trainer. The plane that seems recommended and good for the next step is the GP Stik. The few questions I have are these:

1. .40 or .60? My trainer is a SIG LT-40 and that plane is pretty big. I feel that maybe the .60 is a better fit since I am used to that size already
2. What engine should I use? I know the 2 stroke is the standard but I would like to try the 4 stroke. Also what size engine would be best for the 2 and 4. I have read conflicting reports about various sizes so I did look around the Forum but I am looking for a no-nonsense look at the two
3. Does this plane really handle winds and is a excellent flyer as everyone says? Is this a good next step?

Thanks everyone