Sorry, just getting in on this thread late... That 15 inch Titanic may be overkill for your room size at 12 X 15. As for the Inifinity, I confess I am not a fan. That said, it may not be worth insulting the wife in returning it. Maybe buy a different sub and secretly leave the Infinity disconnected while running the sound through the one you buy for yourself. :-)

In the $1000 and less catagory sub for a room your size I would look at 12 inchers, or even a solid 10 depending on your priorities. Many of the brands already mentioned I concur with... SVS makes a great 10 incher for HT (and does pretty good music in a pinch), so does Hsu.

My favorite, however in the sub $1000 catagory is "The Force XL" by ACI. This is a 10 inch sub that will not touch the SVS or Hsu in max SPL, but it is quite good with music (so it depends on priorities as to which is the more appropriate sub for your needs). Another good one that will take up less space in your room that is great for music and looks stunning is the Rocket UFW-10. This also is a 10 incher that excels at music, but not as much HT (I think you are guessing where my personal tastes lie by my recs... ;-)). Both the ACI and Rocket subs are sold Internet only. ACI's web page is http://www.audioc.com and AV123's (Rocket's distributor) is http://www.av123.com .

Good luck in any case...

---Dave