You can get the Scala Rider Team Set for the same price as the Q2, but it comes with TWO headsets. Older technology, so I don't know how it stacks up to the Q2, but half the price. (Check Amazon.com) Most people I've talked to have been satisfied with them.
I'm just waiting for someone to compare the Q2 and Team Set head to head. I want to know if it's really worth the extra money.