Another thing on the pos camber is that I noticed that tire wear was decreased.
For trottle servo you cannot bet better then a 94737. It is a great throttle servo at .12sec and 70 in-oz of torque @ 6V. The Futaba 9202 is what I am running .21sec at 96 in-oz @6V. Both servo's are around $70. Speed and torque are not as important in a trottle servo and you do not need very much torque to stop a stadium truck.
I would not worry about speed but get torque in the 70 in-oz or greater range.