Panasonic 50 gt50
panasonic 55 st50
I would go for the Paasonic 55ST50 based on its stellar and premium performance. And it has the best black levels.
AV system: LG OLED 55EA980W TV, Samsung F7500 Blu-Ray player, Pioneer Sc-lx81 amp, B&W FPM series speakers & B&W PV1 subwoofer. Gadgets: iPad 2 & iPhone 4s.
Just bought 55HX853, VERY happy