If you go with the JR 6102 or an equivalent Futaba 6 channel with a lot of features it will set you back about $300 and that radio will be fantastic for your trainer through your F-16N. Even if someone comes out with a newer 6 channel radio yours will still be sufficient, have great features, and perform many more functions than you will use for a while. You don't always have to have the newest style...functionality is what you're shooting for here.

Good luck.