Phillyguy. I see your point, my dining room is open to my listening area.
In addtion to the dining room, the stairs to the second floor are in the listening area.
After the 4th step, the ceiling goes straight up to the second floors ceiling. Should I be concerned about sound leaking up the stairs?

I'd hate to go bigger than a 10" sub, the larger size will really intrude with space.
I'll have to consult HSU.

With that said and size aside, I am unsure about getting a Single tuning sub (STF) or the Variable tuning sub (VTF). Does the VTF become more of a pain (switching back and forth for music or HT) or is it the next best thing since sliced bread? Im thinking I'd be better off not worrying about it. But I d expect both music and ht to sound well. How much emphises should go to that feature, especially for the HSU subs.

All.
Show me the light!