My widebody 60 uses a JR 8101 on the rudder and it yields consecutive knife edge loops about 80' in radius. truly awesome. Any more servo there would be wasted. a JR 4721 is probably overkill on the elevator, but I didnt want to buy anouther servo when I had this one NIB. My ailerons are a pair of JR DS-8321's. Really, really smooth and strong. I would go with 80-90 oz/in servos thoughout. I started with hitec 605bb's on the ailerons, but they centered poorly, and when I switched them for 8231's, I had to cut my low rates by HALF because of the increase in power. (realize that I replaced 77 oz/in servos with 88 oz/in, a mere 11 oz increase, which makes me believe that the published hitec specs are not accurate)
some of you guys might remember that I put 9" flaps on the inboard part of the ailerons- they are basiclly held in nuetral 90% of the time by a pair of 517's I recently removed the std. servo on the throttle in favor of a cirrius micro (cs-22?) mounted on the firewall. I love the instant thottle response of .08 sec @6v, plus It cancelled out the added weight of one of my flap servos.