I am using a Schaffer Mat1 dropaway on my Switchback and really like it. See http://www.schafferarchery.com/mat1-arrow-rest.html
There are other models of this rest for other bows. I have also used the Whisker Bisquit on another bow and liked the way it held my arrow steady but didn't like the wear and tear on the vanes. Of the two, I prefer the dropaway.