I'm also extremely happy with the Crown CM311A. I have been using one for over two years, and it still works great. Fantastic sound quality for a live mic.

I have found that my vocal technique has improved by having a headset mic. No more pushing for the higher notes because it creates volume spikes. I am starting to experience being able to hit the higher notes without pushing but by relaxing instead.

With the headset, I can sing and look at buttons, registrations, and at the audience to the side (and even in back of me) and still perform.

Beakybird