OK, here are my impressions of my newly received 58" E60.
The good: Really excellent black levels. I don't have the instruments to actually take measurements, but the blacks look extremely dark and solid for an LCD, and even compared to some inexpensive plasma sets I've owned.
I know the L60 series is not supposed to have IPS panels, but the off angle viewing is as good or better than many other IPS TVs I've owned in the past. I kinda think they slipped IPS panels in anyway!
The bad: I don't have what is usually known as flashlighting or light bleeding. The one thing I do have is a very small area in the bottom left corner of the screen where the pixels glow brighter than the rest. The area is maybe and inch by less than a quarter inch. Oddly, its not noticeable on black or dark screens but is more easily seen on lighter colored program material.
From what I'm seeing on my set, probably the biggest negative is visible DSE (dirty screen effect) on very light colored backgrounds. The DSE is noticeable as faint, shadowy vertical lines. I noticed them while watching an animated movie that had many scenes in the white snow and also noticed the problem on the ice during hockey games. It is not noticeable on other, darker kinds of program material. I don't want to put too much emphasis on this problem. It is there and it is noticeable but its not a dealbreaker, at least for me. I can easily look past it.
After trying all the different picture modes and a couple of suggested calibration values, I find the default Cinema Mode to look the best. The only change I made was turning the Motion Picture Setting to "Off".
I've always said that no TV is perfect and each person needs to decide what features are important to him as well as what compromises he can live with. For me, this Panasonic LCD is a keeper. I've owned a LOT of TVs over the years and this is among the top 2 or 3 LCD sets that I've owned. I think the vast of majority of folks would be more than happy with it.