Look into the Rel Airship wireless steup. Whichever subs you end up choosing, the Airship will make them wireless while also capturing the characteristics of your amplifier. Placement then becomes a breeze. I see in the other thread you’ve selected speakers. Were you able to demo them and are you reasonably certain they will function as desired? Your selected monitors are very "fast" sounding while your amplification presently is anything but. What will the tonal outcome be and what do you need from the sub system.
I would hesitate to procure any subs until you’ve determined what you need. For instance, do you need reinforcement below XXhz or do you require some reinforcement of lower mids. Do you have nodes to contend with (yes, you will, multiple), what acoustic treatments will be necessary and can you address it from a decor and physical standpoint?
Is your amplification appropriate? Its your cart but the cart may be in front of the horse at this stage.