Well Pioneer stop making Plasma years ago. The OP asked who makes the best TV's and, in my opinion of today's technology, you will be hard pressed to find better TV's than the current ST, GT, and VT series of Panasonic TV's in that order of quality.
As far as PQ, the Pioneer Kuro's were light years ahead of the industry in 2008 and we are just now catching up to them. Reading on AVS there are many people who are comparing the 2012 VT series to the Kuros which is good news. Secondly, the Kuro's weren't "smart". No Netflix, Skype, etc... If you were to give me a Kuro I would take it, but on the other hand, if you gave me $3000 and told me to pick a GT/VT or a Kuro I would purchase the Panasonic TV's everyday of the week and twice on Sunday.
My .02¢