Bart,
I love the low-lying feeling of the course, a totally un-produced feel of the design. It is laid out really well horizontally, showcasing Pete's standard excellence in use of angles but also the use of trees as hazards to create vertical interest. Then the small greens are the final piece of the puzzle the really requires precise shotmaking. I haven't played the Honors or Kiawah but to me it's almost exactly opposite of Pete's other designs and the epitome of "low-key" (for lack of a better word) design.
I also think Whistling Straits is fantastic and am fine if you would argue that way, but in my opinion it is complete opposite of Harbor Town. I think Harbor Town showed the possibilities of what was possible on basic sites.