Take a look at this site for the specs, http://www.servocity.com/ They have the prices and torque of many of the servos we use in most planes, Another selling point would be the parts to repair them if needed. A servo you can't get a gearset for is not worth buying because I will need a new one if I do strip one out, You can get gearsets for $3-$4 us for gearsets.

Dauntae