$75K System with Denon? Please.
I am sorry to disagree so vehemently, but recommending anything Denon especially a controller, for a $75K system is like racing in the Grand Prix of Monaco with a Ford pickup and expecting to look (and sound) good. And I like Ford pickups. I have had four audiophile-level systems and priced and auditioned many more. For $75K names like Cary, NAD, Anthem, and even Conrad-Johnson and MacIntosh could be the heart of the system.
My current system includes a high-end Denon controller and it was the worse mistake of my audio-visual avocation. Complicated and unreliable, it cuts out often, probably due to heat dissipation problems. I would not buy Denon for a $1K, $25K or $50K system. Denon's customer service also blows. My advice is to go with something less complicated, more reliable and in-tune with the money you spend. Value should be a goal no matter your budget. Good luck!