ACE gets my vote for now, been flawless for 2 years and counting.... Cant vote for Hitec if only 1 servo is any good (7955) a friend tried some 7954HV servos in his Losi 8T, and 2 have since let go, in about 8 hours use total, no doubt Hitec will look after him, but, stops me from wanting to try them.
Heard great things about Savox, and was gonna try them, till I got handed a couple HV Brushless servos to try in my truggy, and so far so good, very precice and quiet and fast and strong......
http://www.blue-bird-model.com/en/servos/bls-2209.html
A new asian brushless HV servo, didn't someone ask about that previously?