I should add Wild Horse to the thread about the best courses you haven't played. Rod Whitman and I walked it a few years ago, and both really regretted not teeing it up there. We were both very impressed with the course.
Garden City's another course I'd describe as elegant, along the lines of Mark's description of those lovely heathlands courses named above. I wrote an essay for Paul Daley's Golf Architecture, A Worldwide Perspective Vol. 4 titled, "Could We Successfully Build Garden City, today?" Sadly, I'm not sure we could due to the expectations of so many golfers and developers, who expect to be visually "wow'd" by superfluous features.