I use Hitec 985's in my Mugen MBX5-T for throttle/brake and steering, great servo's, only $69 each, and Hitec's have a lifetime warranty I believe.
http://www.amainhobbies.com/product_...r-Servo-S-JR-Z
And I had the same servo's that whitrzac posted a link to, had them in my crawler, and where the pin for the middle gears goes into the upper case gets stretched and develops alot of slop pretty easily, you can replace the upper case with one from a Hitec HS-645MG to eliminate that problem. They are good servo's for the price though.