You really can't claim Whistling Straits / Blackwolf Run are two distinct 36-hole facilities. All are operated under the same roof / ownership.
I too am looking forward when the second 18 at Bulle Rock opens. I wonder if the course will offer something different than the original which I liked but others have different opinions (i.e. Mike Cirba).
With all due respect to Blue Heron Pines and Seaview they are fine 36-hole facilities, but it is really doubtful, in my mind, either would be listed among the top 15 36-hole facilities in the nation.
shivas:
I salute your support for Bandon / Pac Dunes but I won't go so far as to say it's "hands down" over Winged Foot. I too favor Bandon / Pac Dunes but the edge is a slight one. I also believe Olympia Fields offers a good deal of contrast between the North Course (open site for 03) and the South Course which has a few holes that are a bit mediocre but there are a few gems within the 18.
P.S. Failed to mention another 36-hole test of note -- Troon North in Scottsdale and its Monument / Pinnacle layouts. Clearly, in my opinion, one of the 10 best 36-hole sites in the nation.