i purchased a 51H84 from Best buy about a month ago for $1480 (no xbox). The TV has been great. The picture is unbelievable. I noticed a couple black pixels, and I had a Best Buy tech come out, but he said it was dust. I think he is right, but a couple pixels are also blue. I can't see them from 9 feet away, so i'm not too worried about it. Really my only complaint. I have no "white line" whatever that is about. I used the Avia disc to calibrate. my setttings are:
Sharpness: 30 (can't tell either way)
Color Temp: Medium
My contrast level seems high, i actually left it at 60, but when I calibrated it, that's what it liked. I will have to do it again I think. I also grabbed a wavefrom monitor/vectorscope from work, and hooked that up to my TV, but it makes no difference because The "video out" signal from the TV is independant from any settings you make. Anyway, I checked it with the color bars from the Avia disc, and the vectorscope colors were almost right on.
It was too hard to read the waveform levels. They seemed right, but I was getting a fat bar of black levels between 0-7.5 IRE. It should be right at 7.5, but maybe the waveform wasn't exactly calibrated.
Also, the waveform montor wouldn't give me a level from a DVI source, or Component. I had to use my PS2, with an S-video source. I don't know if this is for copyright protection, or the vectorscope can't understand the signal.
When the best buy tech came out, he went into the tech menu, and did the 56 point calibration. He spent a few minutes on it. I went into it yesterday, but It was a little overwhelming. It is so hard to tell that 1 pixel out of alignment. Also, I have a 5% overscan, which I would like to adjust because It cuts off sports graphics. The tech did say my television is one of the best pictures he'd seen. He was laughing at the fact that I even called him because he said the picture is so clean. He was very nice. Glad I got the warranty.
I am also running a Samsung DVD HD player (HD841), and a Comcast motorola box (6208, waiting for 6412 in L.A.). Fantastic TV, i am glad to be part of the HD world now.