As long as you can calibrate everything so the sound is the same volume at your listening position, they should be fine. I run Paradigm, fronts and center, but my surrounds are some Energy reference Bipole/Dipole, I got for $120 total. I don't notice the difference with them being unmatched. Mine are wall mounted, but they are not far from my listening position.
RIP John, my best friend. Oct 17th 1966 - Nov 13th 2010
RIP Victor, my dad, June 26th 1927 - April 13th 2011