Originally Posted by blazar
I am considering the paradigm sub2 in this overall system as well.
The attention to detail regarding the textural aspects of the space are phenomenal! Very nice, visually interesting, many good choices. .
Please, with all due respect, I'd question your speaker choices. Good luck with determining which avenue to pursue regarding mains,...I think you were right to hold off and decide. There is so much personal preference, even regarding mains that are adequately up to the performance task. That said, good luck with your choices for a room that big,...I'd consider Procella, Seaton, Pro audio Technology. I've heard these choices, and they clearly would hit your performance goals, and they are of superb quality.
Now, regarding a subwoofer system; I'd recommend a multi-sub approach, as the response smoothing achievable is highly preferred. Also, I've not heard the Paradigm sub, but for the same price, you could have three Seaton Submersives. According to Paradigm's specs, the Sub2 is down 14db by 10hz. The Submersive is designed to possess superior extension. Oftentimes, owners achieve flat response into the single digits in room. The are multiple large high-end builds, similar in scope and size to yours, which implement a multiple Seaton Submersive subwoofer approach.
Smooth and extended response over as wide a listening area as possible, is the hall mark of a multiple sub system. Even if you go with the Paradigm Sub2, you would have a higher degree of success by utilizing multiples, thus minimizing room effects, etc.
Good luck, and incredible build