I use a bell 946i express its cordless comes with air piece and a variety of mounts for your car or pocket of your jacket it works well it also comes with a ear piece. I dont like wires in the helmet so I rigged up a tweeter so I can hear it . Ialso use a stempro cockpit mount from saeng .It fits in the hole of the triple clamp.
I use a passport 8500 with an earpiece, Has saved me numerous times. I don't go riding without it, Also me mates don't pass me any more (as if they could?) I just wave my hand and they stay behind me, Gives me the open road!!