Originally Posted by Paraneer
For every Denon fan you will hear from, you will also hear from a Pioneer fan. There are many of us too.
+1 to what you said
KingGiant, if you already own the SC-61, here's another consideration to complicate your life
Basically the only real significant difference is that Denon will have Audyssey vs. MCACC. And you'd have to make sure you got a Denon with the best version of Audyssey, MultiEQ 32XT or at the very least MultiEQ XT to have subwoofer EQ. The sub EQ is the main thing to consider trading to an Audyssey system.
While you can get a close-out deal on a 4311 or go with 3313, 2313 (MultiEQ XT) or spend a lot more money to get the 4520 (the better MultiEQ 32XT) you could also buy a DSPeaker Anti-mode 8033 or Velodyne's SMS-1 external sub equalizer for $300-400 and add to the sub out from the SC-61.
4311's are a discontinued model but can still be found for $1100-1500 depending on the "deal", or a refurb.
The amps in the SC are very capable.
But Paraneer is right, what you'll get are fans from either camp. If you are wavering about your purchase, go back to your dealer or another dealer and compare them yourself with same speakers in same room. It's your system, your ears, and only you can decide what sounds best or is going to best suit your needs.