I can't decide which to go with. I have the primalist set which is decent, and would be better left as a set than if I replaced one of the two with the brood ring. The conquerer would be good for the BC grind, but that might not be for awhile. Any suggestions? I know you can't swap rings until exalted, and I just reached friendy so I'll probably be stuck with one or the other.

All 3 rings are good for druids, but it would help to know your role before choosing. I chose the invoker ring for my spell dmg set, because I am happy with my feral set with Don Julio's and an Unending Life.