depends, everyone is different, some prefer Qs8's for the "side" AND "rear" channels. For the front stage, matching speakers id ideal, I don't have a problem with the VP150 matching, but some do...so another matching M80, or vertical ??????? would be ideal.

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