Well, I finally was able to get my 65" Panasonic AX800 4k set. It took a long time for the shipping company to get to my area and then the local shipper was initially telling me that they could not deliver until Thursday or Friday. I had today off from work so asked if I could pick it up and they said no problem. So after a big issue with the shipping company, I finally have my set.
So, let me get this out of the way since I know another forum member has a set and he had really bad banding. I am happy to say that my set does not exhibit any bad banding. I did notice a slight band on the left 1/4 of the screen, but watching cable, movies etc. I had a hard time seeing it. It was on a Grey screen and slightly in my gaming, but even when I pointed it out to my wife, she could barely make it out and while I know it is there, at times I loose it and don't see it. So overall, banding is really not an issue on my set. Screen uniformity overall, seems really good. I ran my PC and used solid color screens to see any discolored areas and everything was really solid.
Clouding is very minimal on my set to the point where I really don't notice it at all. Even on a black screen in between loading things, it is pretty uniform. I did notice a bit of brighter lighting on the left/right edges of the screen, but under normal viewing this is not noticeable at all. I did run a few blu ray movies (Avatar, Star Wars, Avengers, Batman Dark Knight and Rises) and few Blu Ray TV Shows and everything looked really good. I mainly been using the THX Bright Room and THX Cinema mode when watching TV or movies/tv blu rays. I also watched some of the Hockey Final game tonight and it looked really good. Motion handling seemed good and the white of the ice looked pure and clean.
My main reason for getting this set as I did last years model was to use my PC for gaming at 4k. This is the only large screen set that has Display Port which every major Graphics Card has. I have to say that gaming at 4k at 60fps is bliss. Games looked great and input lag as tested from some of the reviews is very good. It is not the best, but so far it has the lowest input for any 4k set. My Sony 4k which I have in the living room has a slightly higher input lag, but really close to the Panasonic. This 4k set is in my gaming room and I moved my Sony 850 1080p to the bedroom. I played through about 3-4 games and so far everything is working great. Some games required some resetting because they were originally set to 1080p resolution, but once I fiddled with the settings they worked great. Or course at the resolution, the desktop was hard to read because everything was so small, but using Windows options I was able to increase things to easily readable size.
All in all, I am very happy with the set so far. I have not experienced any major screen issues which is what my biggest fear was..and yes, I am looking for issues. At this price point, I am not going to setting for bad uniformity or other issues. Comparing movies and tv shows against my Sony 4k x900a, both me my wife think the Panasonic looks a bit better. Not leaps and bounds better, but overall, we both agreed that the picture just seemed cleaner, colors more vibrant etc.
I am still messing with settings and making my own adjustments, as I mentioned earlier, I am using the THX Preset modes and they have been great, I made some adjustments to them, but ended going back to the factory default. One neat feature that is different than last years model is that the Game Mode can be applied to any of the pre-sets, so you can use game mode and one the THX presets. Game mode just seems to turn off certain things to maintain the good input lag.
I will post some pictures of my set and the set up and some game screen shots from some of the PC games tomorrow. If any one has any questions, please fire away and I will do my best to answer them. After about 5 hours of use, really loving the set!