As far as todays trainers go, get the one that fits your color choices as long as it comes with the engine and radio already installed. All the trainers do an excellent job in the area that they were designed to be operated in. There isn't much of a performance difference in the bunch. Make certain that your trainer will have 4 channel functions. Throttle, Aileron, Rudder, and Elevator.

It usually boils down to which one will best fit your budget.