The JR 8411 (same as 8425) digital MG servos are a good option for a MT . ATM they are a good price. I think the specs are .13 sec and 12kg at 6v. We are using them in the steering of Truggies and they are excellent.
ATM are $120 at the below site...
ps don,t believe all the specs from the manufacturers. I find that Futaba and JR are the most believable..