Saw this and thought I'd add in my choice for cheaper servos. I've personally had great luck with the hobbyking Trackstar and Turnigy servos for use in 1/10 racing. I currently have a Turnigy TGY-R12 fitted to my TA07ms which has felt great so far. My retro TB-02 uses a TrackStar TS-D99X which for the price is one of my favourites to have as a spare as well.
I have several of thier now discontined fully alloy case ones (they replaced it with a new version) and have never felt any issues with these even after a few years of running