A couple of quick observations...
My power was just restored at 1AM CST last night, I was in the middle of an attempted calibration with an i1Pro and Calman 5 when the power went out Monday night around 7PM CST. I have not had a chance to finish turning back on any of the special motion or picture functions that were all disabled for the calibration. I was in the middle of taking final readings when the power died, so I don't have a report. The power flickered twice Monday night and I decided to unplug the set as I know how my luck is. Luckily the TV survived the power going out twice.
I do have some minor backlight bleeding from the bottom left corner of the set. Reminds me of a couple cheap LCD monitors I had where there was a small triangle of light coming through the bottom corner. It isn't really noticable during normal content. There is some minor on the rest of the set, but not as noticable as the bottom left corner on a black screen.
I do notice some uniformity issues when a 75% grey screen from the AVS 709 disc is displayed. It appears the top section is darker than the rest of the screen. It is not uniform, not a straight line going across or anything. Again, I need to go back though and verify this again. When sitting in a dark room running through a calibration, your eyes do some crazy things.
The thing which I need to verify is that I still seem to have the same streaking problem that I had with the 65X900B, unfortunately during watching World Cup. I need to put up some full screen white, grey and black images and determine how bad the set is. I watched some TiVo'd playoff hockey, and couldn't see the streaking as I did on the 900B, but I need to try FIFA and NBA 2K14 on the PS4 and see if I notice it. I did get to audition a 78" HU9000 last night with the World Cup replay (they had power, I didn't) and I did not notice any streaking / banding, but man is the picture noisy / grainy out of the box. I hesitate to call this banding on the 900B / 950B, because I don't see Alternating Light and dark bars like on test patterns, on full Red, Green, or Blue screens. Again, another thing I have to test again.
This is a replacement for a 65X900B and was purchased locally. I decided to move up to the 950B after being unhappy with some of these same and worse issues on the 900B. The blacks are definitely better on this screen and gets me closer to the picture of my Pioneer KRP-600M. I also like the look of the panel without the speakers, which I was not using. I will say the 900B sounds 100X better than the 950B. Is the 950B worth ~ $2500 more? Well that is up to the individual. I will say that I was expecting no streaking / banding, but I should have known better after reading through this thread. I don't plan on buying another TV for another 5-6 years, so I am willing to invest in the 950B, plus I financed the difference at 0%, so that made the decision easier.
The crew that brought out the 950B did one thing that kind of made me cringe. They put the TV on it's side when putting the legs on. Do I think this affected the uniformity issues I have talked about above? No. Would I let them do that again? NO. I would tell them to slow down and follow the instructions.
I may play the panel lottery and get an exchange. I don't think the retailer will give me any hassle based on the cost of the set, but I don't expect them to exchange out 10 of these sets until I find one that is OK. I'll try to update tomorrow evening as I am out of town tonight until tomorrow.
So much for my quick observations...LOL...Hopefully this helps some people out there...