I have the Panasonic gz950 and the picture out of the box is indeed superb. But I have to say that the LG E9 I looked at seemed superb too. As long as both are set to the most accurate picture modes.I have been thinking about professional calibration for my Oled that I am getting in the next few days but my worry is that if the TV develops a fault in its first year or so then you have basically thrown money in the wind.
Hence why I am considering whether to get a Pana instead of LG since the former seem to have quite a good reputation for excellent out of the box picture quality
I'd still like to get mine calibrated some day