I completely agree with Akane--we personally feed Kent Professional--but we also show almost every weekend and love the way it gives our rabbits the finish on their coats-our rabbits have done very well on it...with that being said, it is true that you tend to keep and cull based on what your rabbits do on the particular feed you are using...
We raise our own meat rabbits for the amount of meat on the carcass, the growth rate, and most of all mothering ability, these really do not need the "fancy" feed, but they do well on it and grow exceptionally fast. I have found that the most important thing for rabbits no matter what feed you are using is to keep a consistent schedule...they are really just like any other livestock and need a routine--feed the same time everyday if you can and provide good clean fresh water daily, and sanitize feed and water containers occasionally and you should do well--I wish you the best of luck.