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 55EA980W OLED TV, Samsung F7500, Pioneer VSX-LX70, B&W FPM Series Speakers, B&W PV1 Subwoofer and Optimum AV300 Stand.
Just bought 55HX853, VERY happy