As stated above looking at a new sub or used for 60\/40 movies music. Room is pretty large say 25x30 living room\/kitchen with 9’to 20’ vaulted ceiling’. Room also opens up to another same size room through partition and doorway. As far as equipment I have now. Running 5.1 with a Denton avr 760 IBL studio 530 bookshelf speakers a pair of Cambridge Sounworks m60 as rears and an old mirage 8 sub for some bass the sub and CS speakers were free and a starting point. This sub is offered at $425 and see real will have stock soon. Any advice is appreciated and first post here Thanks! And on a cheap note I found a sunfire sd10 for $110 thoughts…..