These are some of Hitec servos that I looked at:
|Bang per buck (Torque/Time/Price)|
For standard size analog servo, the HS-985MG performs best. It is based on a coreless motor. It provides the highest torque as well as the fastest speed.
The HS-475HB is the best value servo. It has the advantage of using Karbonite (just like kryptonite 🙂 ) gears. Karbonite is supposed to be stronger than nylon but has less wear and tear compared to metal.
The HS-645MG has good torque compromise without being overly expensive. It uses mostly metal gear.
For a mega 1/4 scale servo. The HS-805BB looks awesome.