I'm with John, a little confused by your question. In between your rears and your fronts would be your surrounds. Your already talking about using M3's for the left/right surrounds. If your talking about replacing the m3's with Qs8's, I'd be for that as they will do a better job in the Surround category than the direct radiating speakers.



M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85