Where are you sitting in relationship to the rear walls? HT or Music listening % ? For side surrounds you definately want to go with Q's and if you have the room Q's in the back work great. Some prefer bookshelf speakers for the rears if they listen to SACD and other multi channel music. I think the Q's do well for both HT and music.

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