I am looking at getting a 3 channel electric. I have already had a Firebird Commander, but want something with seperate servos and not all built into a control board. I have seen 3 channel electrics that control throttle, rudder and elevator, while others control throttle ailerons and elevator. Which of these is better? I will probably get a 4 channel radio so I can upgrade eventually, but the 3 channel is what I want to start with. Thanks.