Purchase of used Quatro wood ct. Looking for set up advice.

You should either PM John Rutan (audioconnection) here on 
Audiogon, or call him directly.
+1 on joining the Vandersteen Forum. We'd love to see you there.
Bob

Trying to reach John. Thanks you guys.

Thanks gdnrbob. I bought your 3Asigs and talked on phone bit

Oh yeah, I forgot your Agon name.
The Quatro's will be a significant upgrade. Now you will get the integrated subs as well as the carbon tweeter.
I am envious- even though I can't fit the Quatro's in my space.
You might ask Johnny if you can use your sub with the Quatro's. 
Multiple subs will allow you to negate room nodes. And, since you one one, why not use it?
If you need John Rutan's phone number, I can PM it to you.
Bob

great move. 11 bands of EQ below 120 hz is why your room is not problematic. Your ceiling ht is garbled in your post. great advice on joining the owners  forum