I have to say, if you see "RTF" This just means everything should be in place. You still have to check everything over to make sure it is working the way it should.
ARF means it is mostly built and you have to put in the radio gear, motor and hook up all of the surfaces. About 1/2 way between a kit and having it ready on the runway.
Even the higher priced RTF's need a look over to make sure they are finished and ready to fly. I do not trust some one working in a factory to put it together perfectly.
I have this foam Cessna. It flies through almost anything. I have had it in the air with 25 mph wind. Funny to watch it fly backwards down the runway. I spent about 45 minutes making sure the links were adjusted, surfaces set, no binding in the hinges, checked the right and down thrust and so on.
http://www.nitroplanes.com/93a300-14...-blue-arf.html
Looks like you need to get a radio that has a lot of memory to hold all of your planes. That way you need one Tx to fly them all.
Buzz.