I'm building an outrigger hydro airboat and will need to get servos. I called around a little bit and was recommended Blue Bird servos. The high torque standard servo has 144oz. in. torque and .13 second transit time (6.0v) for $15 each or 4 for $45. They have a 2 year warranty.

Otherwise I was going to use the old failsafe Hitec HS-645MG for $32 for steering. This one is 133oz in. torque something like .20 sec. transit time.

This boat is expected to be faster than 35-40mph, so servo failure is not an option.. Are there more reliable servos to use?