If you are running the stock radio a standard would be fine. The digital servos are programmable if you have certain receivers and programmers to act like a failsafe with out having to have a failsafe. You can have them go back to center or any other position you prefer. I myself use the Digital Hitec HS5625 MG. I went digital so when I do upgrade my radio and receiver, I'll be ready to use the failsafe features.
BTW.. that servo has 130 oz. torque and works great even turning the Big Joe or Psycho tires