Why are the Q's not happening, you won't even come close to the same experience with M0's, or even larger bookshelfs for that matter. You would be better off just going 5.1 with Q's and forget about rears in my opinion.

For whatever reason the Q's are a no go, at least go larger on your inwalls, versus 3" woofers.

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