My vote goes for Wolf Run Golf Club in Indiana. I honestly think that the course could be set up for US Open, but would probably be better suited for a PGA Championship. The super wouldn't even have to change the course that much and it would be ready for a tournament. If they have the greens rolling at the usual 13 on the stimp and the rough nice and thick, this course would be a dozy for the pros. The logistics of the site are great too, no houses, wide enough room for stands around the holes, and plenty of parking and tent room.
I also think NGLA would be awesome to see the pros play the holes all different to their strengths.