Don't pussy foot around. Just the strongest & faster servo you can afford for both!
I like (and use) the Hitec 5995TG. (333oz @ .015") I'm probably going to give the new Hitec 7995TG a try too, when they are available in my new 808. I've been running the same two servos (T&S) in my (Losi) buggy for over 2 years now, and I race the %$#@ out of it...
<<ZERO PROBLEMS>>