Chris B.wrote a review of K2 Rant Pro Helmet on January 12, 2010
Sweet helmet, no real issues. The design is cool, audio works great. I 'thought' when I bought it, though, that the audio wired component would be detachable when you dont want to listen to music. Not a big deal, but you have to tuck that stuff under your layers if you want to ride without it.
The speakers/ear pieces keeps everything clean and dry in that area. Overall, a great buy.