Jeff Brauer,
Can a modern course be a "hidden gem"? If so, I think Tierra Verde is one. It flies under the radar (less than 35,000 rounds/12 month year) and seems to be vastly underrated.
I would enjoy your assessment of the course. The greens, Tiff Eagle I think, have never been optimally maintained. The last time I was there, this past summer, the city's conversion to an organic regime resulted in a heavy infestation of nutgrass all over the course, but I sure like the design and variety. Though it has a couple of awkward spots in the routing, it is a fun course to play. The par 5s are particularly good.
Another candidate is Squaw Creek, Lockheed-Martin's course by Plummer. Firm, fast, and windy, it can be lots of fun. I do think the conversion to bent greens has made the course easier and perhaps robbed it of some of its quirkiness.