For Futaba servos. 9252's are great for elevators with one servo. 9650's seem to be the standard for a servo in each stab. 9154s or 9150's on the ailerons. I personally like the 9154's they are faster. A 9151 on the rudder is a great choice. I'm now running the 9351 with more torque, but unless you are flying FAI you probably wouldn't notice much of a difference. My personal setup is as follows.

9254 elevator, only 50oz torque, but lightning fast (.06). I've flown the new sequences without any problems, and CPLR won the worlds with this servo last year, so 50oz is obviously enough.
9154's on ailerons, 64oz, .14
9351 on rudder 192oz, .13
9650 throttle .14/.11, 50oz/62.5 oz I always run digitals on the throttle. Nothing like repeatability for being able to fly precision.

Arch Stafford