Most of the guys I ride with use Sena or Interphone.
I have the integrated Sena in my Schuberth E2 and it's been very good for about a year.
My "commuter" helmet is a C3 Pro with Interphone ucom 16. It's been hammered in all weather (inc blood bike duties) for at least 3 years and been faultless
Integration between Sena and Interphone is exceptionally easy, a total doddle.
Pity more manufacturers don't adopt open standards