I bought a 633u and used pimp's game settings. It took a good two weeks of getting used to but it's been very good.
I watch a ton of hockey and this set scared the crap out of me. The edge-lit tech for hockey seems to be a worst case senario. It's been pretty good. Everything does seem to have a haze or grey overcast to it. I took your settings pimp and tried to pump the backlight, that didn't work. I bumped the contrast to 29 and it helped a bit and kept it that way for a week. Last night I ticked brightness up to +3 and it felt right. Probably a heavy handed approach but for getting the red pipes of the nets to pop and the ice to look white but with texture (it's subtle), that seemed to work. Hockey is a brutal test on these sets. Watched a Tampa Bay game with dark home jerseys on. They are not black but close to it. Your settings allowed accurate color for them with good speration of the blue trim. Some other settings just clicked the uni's to black. Thanks.