This...
Is that Living Room Area open to more space? If so, you need to account for the TOTAL open-room volume.
Subwoofers and Low Frequency Sound Waves don't care about arbitrary boundaries, rather fixed real ones like concrete walls and closed doors.
While the SVS 3000 Series are good Subs, the Sealed box would not be a good candidate for very large space. Once you get above 3000 cu.ft (in an actual sealed room), Room Gain goes out the door, pretty much. You definitely will want good ported Subs for that use case.