Jason, before you do anything really expensive, do yourself a HUGE favor and try this cheap tweek...bi-wire your main speakers. When I first bought my KLF-20s I was so unhappy with the sound the first few days, I was about to haul them back for a refund. As a last ditch effort, I removed the golden bridge and bi-wired them and that helped smooth them out considerably.
Cheers,
Bill W.
Klf-20s (mains)
C-7 (center)
RS-7/white (rear surrounds)
Rotel 1095 (200X5)
Lexicon DC-2 (preamp)
ONKYO 444 (to power side speakers for Logic 7)