Hi All,
Hate to disagree but on my 30% cap I'm running 9001's which are standard sized power (and I do fly 3d) and fairly quick....trust me these are upto the job!!! I would only change them for a faster servo and theyre plastic gears too!!
From experience the servos with metal gears (when flying 3D) tend to wear quickly and with the geometry of the surfaces, the play in the gears is VERY noticeable. In fact the aileron servos have been the most trouble free servos (except for throttle!!).
I would think along the lines of a 9202 which would keep things fairly cheap but very effective.
Regards
Rich