Help with servo choice!

Hi,

I bought me one of these : http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=22802

And were recommended to use two of these for stabilisation: http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=16641

The result was this:
http://www.youtube.com/watch?v=j2KXcBcen6k


So the recommended servo is way to bad in resolution, and a little slow to..
What servo should i get? It's stabilized by DJI Naza, and i want a really smooth ride for the camera.
I believe i need a digital servo, i have not really any clue what the difference is between analog and digital servos.

Would appreciate some links or tips!
Thanks!
 

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