Just curious to get a quick poll of those with the F8500 and a Darblet - what settings are using for your Darblet. I have a 64" F8500 and have been experimenting with my Darblet - back and forth anywhere between 45% and 60% on the HD setting. My display has been professionally calibrated as well.
I have the 64F8500 and have it set at 55. I sit about 10 feet from the tv. The further you sit from tv, the more likely you will have it higher to see the changes.