[Myka]

You won't be able to get a "pair" of young Banggai. Sexing is difficult when they are young.

I think you would be better off with a Fuzzy Dwarf lionfish. They have smaller mouths, and imo better personalities.

The wrasses you won't get to choose sex, other than buying females instead of males (if you choose), but dominant fish will become male. Consider a trio of the same species of wrasses, they are fun to watch. Pick a male and two females, one female will probably become sub-dominant male, and then the other will be super male. Super males often fade into sub-dominant males when they don't have any other of their specie around.