I have used the HJC helmet with the integrated chatterbox. The helmet is okay - but the chatterbox wasn't nearly as good as I would have expected. Poor quality and battery was well under what they advertised for life.
On the other hand, I have a sena SMH10, which I attached to another helmet, after market. I can't say enough good about that unit. the ONLY downside is it's pretty big on the outside of the helmet. It hasn't affected anything - other than looking like my helmet has a tumor. the sound quality on that unit has been great, and the batter life has been great. I rode from DC to sandusky, ohio, listened to a lot of music along the way - and one charge lasted all day.
