I'll throw in the ProTek servos. Detachable leads on some models with good power and speed. I also like the Spektrum servos. I have several older models that have never let me down. The new S6290 looks really nice.
I also have a HiTec 7950 in my Wraith, good company and quality servo. Not a good one for a buggy, but I would buy another HiTec based of my experience with it.
I actually left that out. I'm running the protek 170s in my truggy with good results.