You've got two nice subs and two nice pairs of speakers.
Listen and compare before you buy anything else.
Try swapping the speakers in the two rooms and same with the subs.
Don't buy more gear until you have determined what you think of the gear that you have.
My Rythmik is more tight/musical than my JL Audio E112, and I suspect the same is true for your Fathom. But you might not like the sound I do.