I bought the Laishing Spitfire off Ebay, it sounds like one of the models you mentioned, it's 4 channel, electric and RTF. It flies very well, though it is no beginners model, as soon as it comes out of the wind it can side slip dramatically, it is also a pig to land, you have to keep power on and fly her down, otherwise she will stall or slip on you, she has no real wind penetration capability. Having said that, I get 10 - 12 minutes of flight and she is very rewarding to fly and looks good. The radio gear is ok for the price, the servo's are noisy and a bit glitchy but for the money you can't complain. Anyway I liked it enough to order one of the other models, and as I said value for money wise it's brilliant!