I bought the 50PZ550 and so far have really enjoyed it. I upgraded from an old 42inch Toshiba Regza 42HL167 which served me very well, but broke and I needed an excuse to get a new TV.
Now onto some thoughts of the TV. I decided on this one because of the good things I have seen from the 60PK950 that we have also. I really enjoy being able to access Netflix right from the TV and the dark blacks and natural colors the screen can produce. The addition of the 3D was a bonus, and I was excited to see what Killzone 3 would look like....That seems to be where my one and only real issue is with the unit.
I have noticed a real lag in the unit that I never had with my Toshiba. Now I realized that there would be some amount of lag, but when I hooked up the lag test software I was shocked. I got a very consistent number between 83-100ms mostly 100ms. I used the same HDMI connection that I use for my PS3 and used the TVs "Game Mode" setting and still got the same numbers that I got on my "User settings". Now I am hoping that maybe I did something wrong. So if anyone with the ability and time could run a lag test too and share the numbers with me I would really appreciate it. Or maybe I am not switching a setting off on the TV that is not obvious to me. I really wouldn't care but at this level of lag the game becomes more challenging to play.
Other smaller issues that I have found with the unit are really not that big, but I will run through them quick. first off the screen seems to be more susceptible to IR than the 60PK950 we have. Though to be fare I have not done a real through break-in for the unit and with a quick watching of something else the IR disappears. Also like others have said that when switching out of 3D and going back to a different input, some settings revert to default, the one that I have a problem with is the ISM goes from orbiter to normal.
Other than that I have no problems with the TV though I am still trying to figure out the differences in all the 3D settings.
Look forward to hearing from ya guys later.