I wouldn't bother with digital servos. They use more power, are more expensive you won't notice the difference, certainly not on a trainer. Maybe check the flying club where you will be flying. If you have a JR radio and the club only has Futaba trainer boxes then you will have to buy your own JR to match. I don't like JRs for training because the trainer box needs a battery pack that has to be kept charged. The pack isn't required for Futaba or Airtronics. I went with Futaba just because I liked the way the radio fit in my hand but there is nothing wrong with Airtronics. Also remember that dual rates don't work on buddy boxes. The box will only use the high rate setting. [8D]