Thridle,
I made some trials for a tbone head set company flying the A 320 family some 5 years ago.
Maybe they are better now but make sure you try them first before buying. We use INT during climbs and descends and there was allways a little more backround hish than normal and my voice would have frequently sort of like speaking via a tube effect.
Company ended up selling its project to another one. They had plans to make them wireless. It would be nice to go to the rest room and continue to monitor what is going on up front.
I still use plantronics with a custom made earpeace. (No headband )