I've got a NZD20 one from Dick Smiths.
It's functional but you can hear a lot more of my breathing than I'd like (in silences sounds like I have asthma).
Also I have quite a loud, deep voice and that seems to result in a fizzing sort of noise around the edges of the sound.
These are the obvious suspects at DSE :
Would be interested to hear of experiences with these and others.
By the way I'm not at all concerned about what music sounds through these - I'm completely focussed on speech sending and receiving.