I am a big JR fan, but cant complain about Hitec 625,645,5625,5645 either have used them for years.

I regard to torque/servo power most modellers dont understand what actually are the forces on the control surfaces, and how to properly install the arms/linkages so you are not making your 25kg servo about 5.

Very few control, surfaces or the wooden blocks stuck to ply which servos are mounted in will take a load of 25kg (more than a 4" concrete block)