You can spend big bucks on a servo that meets the requirements you have, or you can spend just a few dollars.
I have been comparing the Hitec7954 and the Solar D772 in two almost identical trucks. With both servos putting out right at 400 oz of torque and the speed of each is also very close.
Well the Hitec at over $80 has no noticeable differences while driving than the Solar with a price tag of less than $30.
Both of these servos have survived some real ugly crashes and, they do the job of turning both of the near 11Lb trucks. The only real difference I see besides the savings of $50+/- is, the Hitec has a prettier case.
Now don't take me wrong Hitec's have been my go to servos for quite sometime. Great quality, Great product. The Solar has taken the abuse for the last several months like a champ. So much so that my Summit even now sports a single Solar D772.