ZT has my vote, I don't get all this talk about the brightness of the panel as well, I have a GT 50 and is damn bright enough! Have no problem watching in daylight and I have 5 windows on the side wall of front of my house. You can't analyze it properly at stores until its in your own home.
Media room- LG 4K OLED EG9600, Pioneer Elite VSX-90, Samsung 4K K8500, Klipsch Gallery G28's, Klipsch Sub 12, Klipsch RS-52 II, Optik HD cable
Living room- Sony 4K 79XBRX900B, Onkyo RC-360,HTPC, Klipsch Reference R-62II, Rc52II,PS4
Gaming room -Panasonic ST60, PS3, Wii