I just upgraded from Klipsch Synergy to Klipsch Reference. I have RF 82's as the front towers, RC-62 as the center, and I am thinking about getting another set of RF-82's for the rear. I have just under 9 ft from the back wall to the sitting area. Is this enough distance to deploy towers without them being overbearing?

That sounds like plenty of space.

I was debating whether to use my current towers as rear speakers as well...too bad I would have less than a feet of clearance.