Linear Tube Audio is located in Tacoma Park Maryland--a suburb of Washington D.C. I have never visited them, but, I've met the main players at Capital Audiofest and they are extremely friendly, helpful, and very open about their products (even to the point of disclosing what compromises have been taken for the sake of keeping price down). If they allow visits, by all means arrange one. It should be rewarding.
The Aurorus Audio Quasar
I have a modified version of the Aurorus Borealis. Meaning, some of what I would consider upgrades to the hardware but with the exact same drivers. I am very happy with them as they fit my head, they are comfortable though a little on the heavy side and sound musical and non fatiguing. Nevertheless, Aurorus Audio recently came out with an upgraded version to the Borealis called the Quasar.
https://www.aurorusaudio.com/Quasar%C2%AE-p619964083
I can't afford to buy a pair right now but plan to be in the not too distant future. Currently there are no reviews available via the internet. So is there anyone within the Audiogon community that have either heard them or that know anything about them?