Chuck, could I suggest that you post a larger image. The problem I have found with panos is that the viewer really does not do them justice and one needs to be able to get a larger view of the image.
You can see what I mean on the panos I posted in this thread:
Mixed lighting shots Click on one of the shots to see what I mean.
My other question is why you used HDRI; I would have thought that the dynamic range in this image would have not have required that treatment. The image looks a bit flat because of the HDR treatment.