I suppose we could look at this different. Minus the one stat. What's the quality (materials wise) used on the X3700 vs StormAudio, Trinnov, etc... What's the warranty like for those Denons vs higher end manufacturers? which one will you have to keep purchasing a new machine to stay updated? Which ones give you unlimited options to tweak speaker and bass options? who has the top customer service?
I'm sure there are more, but I'll just put those for now. Others can chime in if they want. Is the high price justified? To me, sure. I'm willing to spend more to have a higher quality machine, better warranty, 10x more features and ultimate customer service. But that's just me.