I had a Focal Bathys. They sounded great, but the build quality was laughable for such a high priced pair of headphones. Some plastic bit broke and they've become unusable after only two years.
So I bought some cheaper BT headphones just for home office purposes, calls and such.
And I treated myself to a dedicated USB DAC (iFi Zen DAC v3) plus wired headphones (Hifiman Arya Organic) connected with a balanced cable.
Never going back - I don't think that kind of sound quality is even possible with Bluetooth.