Your room has about the same volume as my old living room, where I had an SVS 25-31PCi as my sub. The LFM-1 Compact's specs are not too much different from the old 25-31PCi (maybe a few dB less output, but the same basic frequency response). Having it paired with a Fathom would seem to me like a workable approach for smoothing out the overall in-room response. The Fathom will probably be on its own for the really low stuff (I'm thinking that it has a lower -3dB point, although I don't have the specs in front of me to say how much lower), but for a great deal of the LFE domain the two would be able to share the load.