I'm no expert, but I am a satisfied customer, so my opinion may have some value. I'm using M60s, VP150 and an EP175 in my room (18x14). The M60s have recently replaced a pair of PSB Image 4Ts. Prior to the arrival of the M60s, I always used the EP175 to fill in the bottom end for music. Not so any longer with the M60s. The M60s, especially in your small room, will likely not need a sub for music. As for the EP175 for movies, setting the M60s to small and all below the receiver's x-over point to the sub, it rattles my room with more than enough power and LFE for my tastes and needs, so I believe that you can expect even more spectacular results in your room. In sum , I think that the the EP175 will provide all the zip you require, no EP350 needed. Cheers!