60 size plane, Futaba 3010 on 6 volt should do nice,, Of course there are always they fancy digitals if money is no object.
You could probably do with less on ailerons, But for the elevator and rudder I wouldn't go any less Of course throttle any standard will do.

http://www3.towerhobbies.com/cgi-bin...&I=LXDTB3&P=SM