As an owner of both Reference and Heritage series, and some one who loves to go to Best Buy, I am surprised they charged a restocking fee. I purchased an RC-52 from Best Buy, that afternoon I found it for a lot less from an authorized on-line dealer, so I returned the RC-52, they didn't apply a restocking charge. Maybe it's against the law in MA, lots of things are.
The rule is simple, Synergy stuff matches Synergy stuff, Reference stuff matches other Reference stuff, Heritage stuff matches other Heritage stuff. It's not just about Frequency response and efficiency, but also about timbre or sound characteristics unique to a line of speakers. I fell in love with the Reference as soon as I heard them, my Heresy II's now sit under a blanket. This really gets a lot of the Heritage people going, but hey everyone has their own taste. I see the Reference and Synergy series stuff as the company's future and the Heritage stuff, a fantastic past.
The Klipsch families each have a unique sound, I love Reference series, so I purchased everything with the purpose of matching. I wouldn't mix my Heresy II's with my RF-52's and RC-52... which go together nicely, they were designed as complementary stuff. Herein lies the rub, I would love to get a pair of the RF-82's but then I would have to upgrade my center channel as well. Instead, I'm buying an RSW-10d, a Reference series woofer. For back channels I'll go with RB series speakers. The unique sound characteristics of each line, Heritage, Reference and Synergy are part of what make Klipsch unique, all three lines are good. I don't thnk the Heresy II's would make good back channels for my Reference series stuff.
A lot of klipsch people seem to spend tons of money on this stuff, spend on what you really like and can afford (stretch a little), this stuff lasts forever. My mom got a pair of KHorns in 1962 and a Heresy center, she still has them all and the power equipment she bought with them. I bought a pair of Heresy II's back in 1985, they still sound as good as the day I first brought them home.
Listen to both Reference and Synergy series, figure out which one you like better and purchase the matching products for it. Klipsch pretty specifically shows how to match.
Happy hunting
"You're gonna eat lightening and crap thunder..You're gonna be a very dangerous person."
Mickey Goldstein to Rocky Balboa
Enough Klipsch products, which only leads to the desire for more.