JKA all the way!!!! If it is combat or sport that you want, these planes are top notch. Ive gone through my fair share of these planes and I can tell you with confidence, that these planes are awesome. They fly great and are super easy to repair. Nothing a little tape or gorilla glue cant fix. Ive replaced engines before fixing anything else on the airframe. I personally like the corsair the best for its stability with its wing dyhedral. The zero is pretty quick along with muststang but does suffer a bit with slow flight stability. Prop selection will definately make a huge difference with launching and lowspeed aerodynamics. Like everybody else mentioned before, stick with the OS .25 FX, you pay for what you get. It is a definate must that you reinforce the wing the provided balsa or I prefer like most the carbon fiber. Take your time through to ensure all the building is true and you will be extremely happy with the outcome. One thing I feel a lot of people suffer on JKA model outcomes is there final taping of the aircraft. Pay close atention to keeping the aircraft aerodynamically clean. All the little wrinkles and lines add up and increase the amount of parasite drag negatively affecting both stall and top speeds. Overall I cannot recommend these planes more. I hope they come out with some more warbirds and increase their selection. Hope yours turns out good!