Okay, just got my new UN65H800!
Quite happy with it so far, but noticeable black uniformity issues unless Smart LED is turned on.
I run my blu ray player and my PC through my Denon receiver, through HDMI to the TV. When I name this source "PC" then switch sources on the receiver from actual PC to blu ray, the TV somehow knows these inputs are different and will save different picture settings for each. This is nice, and would be perfect if PC mode allowed Smart LED to be activated. I use my PC for games, and the flashlighting turns up more in games than it does in movies it seems (loading screens, etc.).
Otherwise, if I name that source on the TV "game" or "AV Receiver", whatever picture settings I set are global for that TV source, regardless if I change the Denon's source. This is annoying since I'd want to use something like game mode, and different sharpness settings for when the Denon's source is my PC vs movie settings for when the Denon's source is my blu ray.