i think a 125 is ok for a naso, or a sailfin. but not both you have to plan carefully for a reef tank, and want to make sure you provide a good place for your fish to live. i dont think you should consider adding the triggers at all. if you like your shrimp and less aggressive fish like a mandarin or the firefish you should not do this. the triggers are going to either bully or kill the less aggressive fish and more than likely kill your hermits and shrimp. i know people keep triggers in their reef, but all i see people keeping in their reef is a blue throat and that is pushing it in my opinion.
its your tank and you are going to make the final decision, and I am not a member of the tang polce, but make the right choice, and make an educated choice.