Setting up B&W ASW3000

I have a suspended wooden floor in a 13'4" X 19'5" room. Placement is limited but I am trying to get the most out of this sub. I am mating them with Merlin Tsm Mxe's. I will probably be building a pair of Lil' Mikes exodus tapped horn subs soon with an active X-over. Until then I am trying to integrate as best I can. I may purchase Aurelex Great Gramma since the sub is huge! any advice?

Second question: My listening room opens up into a dining room with a large opening, can I utilize the B&W sub in that room for H/T so I can have room for another rack to place a turn table and several other pieces of gear