Alternatively, I can plug the audio out of my phone into the input on my PS Engineering audio panel
For those that have a PSE PMA8000B audio panel, there is now a Bluetooth version (PMA8000BT) which allows both phone conversations and streaming audio from the iPhone (and some others) with the option of some or all occupants listening to music or participating in the phone call. Just took delivery of a new B407 with this audio panel and it is superb. It is my understanding that existing 8000B owners can return their panel to PSE for a BT upgrade for $400. Much better solution than BT in the headset IMHO.
Lots of info on 8000BT here:
PS Engineering :downloads
I have used the Bose Series X for as long as it has been available without a problem or complaint of any kind. Just ordered two of the A20's without BT and hope they are as good.