for their time the 4070 was liked. I think it was developed as a monitor originally. I keep my eye on the FS to try and catch one, but haven't seen one in a long time.
My wife and I game in the same room, so hearing her on TS and in the room is distracting. I liked closed for gaming for that reason.
There was one 4070 for sale last December. It sold in a day.
https://www.head-fi.org/threads/fs-stax-4070-inmaculated.866991/