I find it curious that you don't seem to trust your committee enough to make them essentially powerless moderators and yet you want to give them a special power to essentially issue broadcast messages. I think option 1 would work fine for you. We have several people, classed as Mentors, who have option 1 privilege. They are part of our second level in our nonprofit and have never violated their privileges in several years. Either you trust people or you don't.
