My kids got me the Skullcandy Bluetooth setup (designed for Smith, but look like they would work in other helmets) for Christmas. I'll let you know next week how they work (in home test, at least).
I considered the Outdoor Technology ones. Reviews were pretty consistent with the Skullcandy, but a few said the sound wasn't that great. I took that with a grain. The one thing I liked about the Skullcandy is the control device you can put on the ear flap of the helmet. Easily accessible buttons. Hope it doesn't look too stupid on the helmet. The Outdoor Tech setup has their controls on the speaker itself, no? Seemed like it could be inconvenient to jigger with the controls hoping to press the right spot on the ear flap of your helmet. How have you found that to be?
We REALLY need a proper roll eyes emoji!!