Go with the best and then test each one. I just went out to the desert to test fly my twin jet only to have a flap servo completely fail on me. This plane has 10 JR 8411s and five micro servos along with 2 I4C isolators, 4 6.0 volt servo battery packs and 2 4.8 volt receiver packs. I have backup systems for all of the primary control surfaces and battery systems. This does not mean I will not suffer a failure, but it is extra insurance, should something go wrong. I have a lot of cash tied up in the plane and I would hate to see it go up in smoke, only to discover it was due to the fact I wanted to save a few bucks. The cost of servos is small compared to the overall invertment in the plane.

Just my .02

Sung