The Q's are much better for surrounds than direct radiating speakers (bookshelf). Whether you go 7.1 has a lot to do with where your sitting in respect to the other speakers. You say you don't notice much difference, does your receiver do PLIIx processing, that makes a huge difference.

If you decide to go with just 5.1, make sure you place the Q's in a position so the rear tweeter is bouncing off the back wall to give you that 7.1 feeling.

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