If you just want to fly a bigger sport plane, not looking for hard core 3D, I'm not sure of the logic in back of going with some of these (50cc +) suggestions? They're expensive, and from what I've seen, they can be a little over the top for somebody just looking for sport performance. I would suggest you look at the 4*, the Giant Sportster, or something similar in the 26 to 35cc, 1000-1100+ sq. in. range. This size is about half the price of a 50cc. Then set it up nice and simple like you would a .60 size - just make sure to use metal gear servos. Maybe get something that size under your belt? Some of the rear carb config engines in this class will not leave you disappointed regarding performance..... Unlimited vertical pretty easily achieved with them.