I am running SRT Servos now in my second Session. I used the 8015 in both 1/10 Buggys (2wd and 4wd). They worked very well and are extremely fast. I only twisted on gear but this was my own fault. It was my first 1/10 year and I crashed a lot.
Last year I used a BH 9022 and a BH 9027 in my 1/8 Nitro Buggy. I had no Issues with them but I saw some broken gears in the past year. I think the aluminum gears are to weak for Off-road racing. A good friend of mine is using a 927R since release and this Servo is very durable.
I chose the BH922R for this year in my Nitro. But I think I will switch to an BH927R for throttle/brake. The 922R and 927R have Steel /Titanium gears. They are very durable and last longer.
My personal recommendation for 1/8 Offroad are definitely the 922R and 927R.