I use the wireless AX thing a couple of times a year and it so happens that one of those times coming up in a couple of weeks.
I don't care for the headset mic either, although I had good results with it. The 311 C has some built-in limiting going on so you really don't have to adjust your voice much. I can still hit the high notes, but don't choose to most of the time, because the audience really doesn't care.
Oh, I forgot to listen to BB. I'll do that now.