I always thought that if I got a pearl badge, then I would get the pearl guard as well.
I have a plain gold guard now (with a standard badge) and I have had various dangles. Right now I have a pearl dangle b/c I think it looks classy.
Anyway, whatever dangle you choose should be fine... I think that a pearl badge and guard with an anchor dangle will look very nice.
Did I mention that I'm jealous?!?