I would love to have the freedom of a head-set microphone, i.e., to be able to move my head around in a more natural manner than always needing to be in close proximity to the bulbous end of an SM58 or whatever.

I was thinking that some Catters may have experience with the head-set mics and be able to give an opinion on good models, bad models - or no good models. You may also know some of the problems associated with them during a stage performance, or the positive aspects of them. I would appreciate any feedback on this before I just run blindly into the store.

Over the years there have been many "pop stars" that have used them but I haven't seen any folkies use them at all. Can ya' help?
Cheers.