Did I not concede and give you credit for providing that evidence? And what is it if not empirical? Why are you taking that as a slight against what you've posted? Excuse me for not revering your contribution enough. I'm not the one getting emotional here.
All that being said, it is still an anecdote regarding what happened to 2 of the Kuros you have. There's no way one can truthfully expand that to every Pioneer Plasma set (same with the blue and red tint problems, as one has to use supposition and extrapolation to make the case that ALL sets suffer). Also, I realize all manufacturers are subject to QC issues, but Pioneer has a better track record than most (and the Consumer Reports reliability studies have confirmed this). Yes, Panasonic is now at the top of the heap when it comes to quality control in the display realm (and I also realize they were not far behind Pioneer before they exited the business).
Your original comments about the Panasonic "blowing away" the Kuro when it comes to high-def picture are not based on a universal truth but your opinion based on the measurements you've taken of 2 sets (one from a set that is now 5 years old), akin to the expressed concern about a breakdown, which is another extremely rare event for these panels (I moved one cross-country and it still functions like new). D-Nice's admission that he prefers to calibrate every 3 months does lend some credence to your theory that facets of the image may undergo change quicker than what would be expected or preferred (and this is not necessarily the equivalent of "loosing" PQ).
For the record, I would definitely grab a Panasonic instead of an 8G Kuro...the choice between a used 9G and a Panasonic would be much more difficult at 50-60".