i seriously love my airtronics 94359
200 oz of torque
.10 transit time
= best servo ever!! its pricey tho, i got mine for 122.99 but it will last you and last you. it has a heat sink on the case to =D
i run a 645MG for my throttle on my buggy and its okay to.. but i run the airtronics for my steering, its very powerfull, you have to get used to it.