Prez of our club is using 4-225s on the wings(very quick)2-605s on the elevater and a 615 MG on the rudder.This is the popular set-up in our club on the bigger planes and it doesn,t break the bank and is reliable.I use 605s on the wing for monoplanes but our prez can,t seem to break his 225s on his DP and he does 3D so i might try them also and they are powerful little guys(over 60 on a 5 cell pack)I wouldn,t use standard servos on such a big plane,not worth losing a 800 to 1000$ finished project over a cheap servo.