If your reefing library is thin on books, search the names of these fish in Google and read all the results. You'll find that most will advise against keeping the "moderately aggressive"
Centropyge bispinosus with other dwarf angels, unless your tank is >80 gallons.
Hey, your tank IS over 80 gallons!
Another "trick" is to have disparate sizes between species, and add them simultaneously, if you must have two.
I know you're carefully considering your options. Good luck!
Alan
