So I reread the OP, and while I was under the impression that this was more for music, now I’m not sure. It says cinema room, and then later new screen.
In any case, I agree with Ryan to ported, and stand by my statement as such.
Considering location, I would look here.
Cinema 3X12 subwoofer. Absolute home theater specialist. Bass like an earthquake with perfect precision. The 3 x 900W amplifiers always have full control of the 3 high-end drivers.
www.xtzsound.eu
SVS makes fine subwoofers to be sure. But if you have any issues, dealing directly with a manufacturer can be a lot better than dealing with a retailer.