Savox 2274SG, SG is for special steel or spring steel and so far have proven to be the toughest servos thus far.
The only draw back to Savox is they can glitch because of excessive power draw, this is an issue mostly with weak power bus in the some of the older spektrum receivers and sometimes weak BEC in Speed controllers.
Futaba servos are also very nice
My overall choices so far for electrics
Savox 1257/1258 for 1/10th scale
Savox 2274SG for 1/8th scale
Hobbywing Speedos
Futaba Radio (4PKS-R, 4PX)
I really like Trinity motors, I use em all in 1/10 and have used D8's in 8th scale but last year my bullet proof setup was Hobbywing to Teking Gen2 1900kv
Trackstar red can motors, local guy runs them and swears by them, not to mention he is a top tier driver.