IMO, any Bluetooth-based technology will be a failure for any real quality audio. There’s just way too much latency added and dropouts.

I like to look at the audio systems that professionals use in broadcast television, and then loo around in that space for creative solutions. The Røde Wireless Go microphone is one such solution (see http://www.rode.com/wireless/wirelessgo ), but that only handles the microphone side. I still have yet to find a good professional grade audio solution for headphones.