For what it's worth..
98% of my servos is the JR DS 8711,

it has 440 oz of torque. They are like $140 each thou but worth every penny..
The new Airtronics 94780 is also a killer one,

it get (I think) 420 oz of torque.. but again it's like $120.00..
Remember you get what you pay for!..
Hope that helps..
Have a great one