I am comparing a used Denon 3805 to a new Marantz 5600. Both will set me back about $550. They both sounded good to me, but I can't audition them with axiom speakers. Are they any owners of either of these that can share their experience and preferences?

Denon 3805 advantages: More features, mic setup, more inputs
Marantz 5600 advantages: new, 3 year warranty, SRS

Both have multi-room which I want/need. Both have lip-sync delay, which was a must as well. Both sounded good with B&W 601 S3 speakers, which is what I auditioned. I did notice a difference between them, however.

The Marantz seemed fuller, but the Denon seemed to capture more of the high frequencies. Was this just in my head? Does Marantz or Denon do additional audio processing?

Both sounded WAY better than the Pioneer VSX-108 that I have now!