Regardless of the suggestions that you get, try to find actual tests of the speakers to find the actual sensitivity. The specs are often highly exaggerated. For example:
-3A de Capo: spec 92db, actual 86-87db.
-Klipsch RP600: spec 96db, actual 89-90db
-3A de Capo: spec 92db, actual 86-87db.
-Klipsch RP600: spec 96db, actual 89-90db