Ep125 and 175 won't cut it. For music, you need two 500s up front in your space. Not sure how you can feed each with their respective low level signals. I have dual DSPs with the LFRs to feed my 500s and the 800 for the .1 channel. For the M2OW, I use the Pioneer pre-outs to feed my upstairs dual subs. Never going back to a single sub again.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated