I recently purchased the Energy Take classic HTIB paired with a Denon 1911 and I'm actually quite impressed on how well it sounds both musically and for movies. I do wish the sub could deliver more punch for movies though. If I were to purchase something like a 10" or 12" by HSU, Mirage Prestige series or Lava sub to run with the 8" Energy would it be worth it and do what I want or would it overpower everything? Should I just look to replace the 8" or could it be used kind of like a mid driver? The room is about 15x25 and open to the stairs (split foyer), the tv and av equipment is on the short wall of that, so we sit about 11' away, tile and carpet floor (concrete underneath), no wall treatment.