RE: Standard servos
I like the 537 servo. It's not the fastest, nor strongest servo available, but they are reliable and fairly smooth. But, I don't buy them. At least, not with the ball bearing installed. Instead, I buy non ball bearing servos and install aftermarket ball bearings in them. You'll save a few $$'s per servo and end up with the exact same performance if you had bought the bearing already installed.
John