Sound quality it's gonna take more than one or at least a single 6 foot column.
3 1000.00 or 4 750.00 subs if you really want to THUMP! Just make sure you can decouple the subs without added work to fix the speaker.
I see you picked a sub that's NOT firing down.. That makes a big difference weather you feel it through the house (butt and feet) or feel it in your chest.
Big difference.. A lot more neighbor friendly and a much better design.
Servo subs a Whole Different Story..
Regards