Kirk,
I haven't played Denver CC either. There are still quite a few courses in the Denver area I'd like to see--that one, Columbine CC, Ravenna, Bear Dance, Fossil Trace, etc.
Matt,
I have played more of the courses YOU like in Colorado than Arizona, probably similar in terms of the overall (I've missed at least as many of the overall in CO as AZ). I tend to agree that the private side is probably fairly close. Castle Pines, Ballyneal, and Sanctuary (which I know you don't like that well) give CO the edge at the top, and I think Cherry Hills, Colorado GC, Pradera, Roaring Fork, Adam's Mountain (a new Weiskopf), and CC of the Rockies provide some very solid designs. AZ certainly has a strong list in its own right.
The public side to me is where CO runs the table. You've named and played most of the CO favorites, I just don't see there being enough depth in AZ that can match the quality of Lakota, Red Sky, Redlands Mesa, Cougar Canyon, Broadmoor, etc. I haven't played all the super high-priced stuff in AZ though either, so perhaps Greyhawk or The Boulders would change my mind.