i bought a noise hush off ebay, and im satisfied with it. works great in my new helmet as its a pretty quiet helmet, but otherwise the speaker is not very loud. then again, i have it mounted under the fabric by my ear. would be nicer if i had gotten the unit 2 speakers instead of 1. plus the main unit mounts nicely to the outside of the helmet with simple controls and can be removed for charging. but the talk quality seems to be fine as i havent heard any complaints from anyone ive talked to while riding down the highway. battery time isnt too bad either for how small it is.

 

I have the Torc Blinc T-22. I love it. Works great and it was under 300.00.

http://torchelmets.com/helmets/interstate-t-22