Someone asked about headphones. These are Sennheiser HD 800s with a Schiit Asgard amp. The amp is fed via a Music Streamer II USB DAC that is plugged into the Mac Pro. (The Music Streamer II is under the desk and not in this photo.) I have a Schiit Bifrost DAC on pre-order. I might look at upgrading to the Schiit Lyr once the Bifrost is shipping at the end of August.
In the foreground are Sennheiser PXC-350 noise canceling headphones that I often use on flights. However, the size is a little bulky, so sometimes I just take the Apple In-Ear earphones and rough it.
In the background is a pair of Sony IR MDR-DS3000 wireless headphones that I've enjoyed heavily for the last 6 yrs, but there's some audio fidelity issues with them that may result in an upgrade at some point.