troyd,
The idea for using the QSx speakers as surrounds is based on their ability to disperse sound effects in a more abstract way creating a diffuse sound effect that makes it hard for the ear to localize. Dipole speakers do something similar by firing in 2 direcitons. The QSx design fires in 4 directions (essentially).
That being said, some people do prefer using direct radiating speakers for their surrounds.
You can see my thoughts on this subject at this
old post.
Secondly, if you are interested in other's opinions on the Axioms and Energy speakers, you can read my thoughts at this
recent post on a slew of speakers i went to audition with a friend.
