Viewing angles is no longer a big issue between plasma and LCD. My sceptre is visible at very wide angles, trust me, with the size of my family, sitting in front of the tv is not always an option.
Lifespan is diminished in high altitudes. I live in Denver, and I have noticed that most Plasmas that have been purchased by family and friends do not last long at all. Most companies have given the explanation that it is the high altitude.
I am a gamer, and I play CODWAW WOW and many other games on my 46" lcd and to be honest, I never notice motion blur, but I am also not trying to find it, the new 120hz systems have virtually eliminated motion blur from hd signals, and most Game setups.
You say that you have tested these things, but I see no proof, no pictures, nothing other then words to back up you claims. Most of the things you list are old diatribe from the beginning of LCDs, most of which technology has defeated at least 2 years ago. Yes Plasmas have blacker blacks, and depending on the LCD, plasmas can have better colors, but why spend more money on a technology that will remain on the top of the price list when you can wait a bit longer for LCD to close the gap. Plasma, like all technology, is limited in its expansion, or upgrade ability, LCDs are as well, but with the innovations streaming out from LCD R&D on a daily basis versus the fairly stagnant development of Plasmas, I would say that the LCD has a better platform to keep it going for years to come.
I would say to purchase current equipment, and redo this article with more visible proof to back up your claims.