This is what I use:Firefox http://www.firefoxtechnologies.zoovy.com/
Granted we are on ATVs but I still wear a VX Pro helmet. The nice thing about it is that you can make tons of noise (we shoot) and the noise wont b picked up and transmitted. The bad is that -if it's a bumpy ride- you may have to tape it to your neck to keep it in place. I use them with motorola 2 ways but Scalas and the like should b ok. Stay away from booms bc of the air vent on the helmet, you'll drive your mate crazy if it's set on vox. All tht wind noise will be playing in both your ears nd your bAttery will last as long as a teenage boy in prom night. Push to talk is another story but hard to work on technical situations.
Hope this helps.
Btw these are Also good to have For that "bump in the night" scenario. I have one on a load vest nd my wife has one by the night stand. You can go check out on the kids and still be linked.
No surprises when you re enter your bedroom with her saying:oops I didn't know it was you. Now we need to patch the wall And you too