I watch my TH-42PZ80U through my Comcast Motorola box via an HDMI cable and only watch the HD channels (though they don't always show HD shows). I've been having a lot of fun for weeks experimenting with calibration settings. Even though my shared-with-you settings have been different from each other, they still have produced really really good pq. This is a testament to how good the tv is with the Cinema setting. Basically I look at broadcast color bars and work to get the yellow more yellower and the red less glowing, and to increase the black detail without making the picture too bright. Then I look at real programming to judge the results.
But I have finally hit upon a great setting (the proof is that I haven't tweaked it for like 3 days
Picture: +85 (Increases the brightness without losing much black detail.)
Brightness: +51 (I vary this between about +38 and +58 depending on program and how much black level detail we want to see. Some programs seem to like being way dark, like Bones or Medium, while other programs are more normal. I wish I didn't have to vary it like that, but if we want to see things like lapels on a black suit we have to. When I used a DVD to do the THX video calibration, brightness came out at +28 when I got the drop shadow to disappear, but +28 is too darn dark.)
Color temp: Warm
Color mgmt: Off
C.A.T.S.: OffAdvanced Picture Settings:
3D Y/C filter: (Off and grayed out, but I am going to find a way to turn it on because I am getting some rainbow effects on close black lines.)Color Matrix: HD
(This is the secret setting! For an HMDI source, it is grayed out and thus not accessible. But if you set it to HD using a component input, when you switch back to HDMI, it stays HD and its effects on the color settings stay. I find that, on color bars, it makes cyan and green darker/stronger, and it also makes yellow strong and not greenish, and as a result the red is not so blooming.)
MPEG NR: Off
Black level: Light
HD size: (Doesn't matter - it depends if you like to see the noise, if any, or not)
With these setting the colors are beautifully vibrant and the HD detail is wonderful. The only bothersome thing is that I have to vary the brightness depending upon the program I am watching.