Jp1208, my room is comparable size except I have 8 foot ceilings. The adjustments, and automatic calibration is well worth it when it comes to sound quality are worth whatever it might cost above some of the other subs people have mentioned. I thought is sounded good, then I ran the auto calibration and it was like night and day! I used to have a Paradigm PDR12 which I thought sounded good with my fronts, but the Fathom blends even better with them.
Some day I hope to have a space that can handle 2 Fathoms. I think the structural integrity of my home would be compromised if I had 2 in it!