Don't know about Denon. Havn't ever had one although I'm considering them now.

Me personally, I set the volume to 75 dbs at 0 trim to the mains with the channel adjust. Wherever the volume knob happens to be, is wherever it is.....

that's weird your sub distance is so far. My HK 745 did some pretty funky things to my set up when I tried their EZ EQ set up. I gave up on it and just set up the channels the old fashioned way with a SPL meter and tape measure.