By popular demand.

Once you move off center the high frequencies drop off fast.

I have naked Quad ESLs!

Vinyl still wonderfully analog.

Does the Sota go through the room processor?

I know them well! I have been party to the destruction of three of them.
Mark Levinson made a stand that stacked two Quads on either side of a Decca ribbon tweeter. The system was finished off with two 30" Hartley subwoofers. It was driven by six 25 watt John Curl designed amplifiers.
In trying to get it tuned properly we destroyed I don't know how many ribbons and three quads. The system went deceptively loud and the Quads never sounded stressed, they just fried. Eventually, we got the hang of it and the slaughter stopped. As far as I know we only sold two of them. This is in Miami, FL. 
That Quad is a magic speaker. It has that ESL rightness that is lacking in dynamic speakers. Back then it was the only one readily available until Acoustat launched the Model X which was hopelessly colored due to a really bad cabinet. With the Monitor series they finally got things right.
If you come across another pair you might try stacking them. Just a thought.

Indeed! Impressive story. I've had the pleasure of hearing stacked Quads with a Decca Kelly ribbon on Croft OTLs. No subs. Large room. Opera. Late 80s. Nice. 

If you come across another pair you might try stacking them.

Not enough room and I prefer the superior focus and intimacy of the point source from the single pair.