I just got my 65" ZT60 over the weekend to compare with my f8500 and keep whichever one is best. The screen on the ZT60 is near perfect with no visible dirty screen effect (which I have on the Samsung). But what I found when I plug in my ps4, is that it seems to be crushing blacks, leaving a lot of shadow detail non visible.
I have a kuro pro 101fd elite hooked up and the 8500 for reference, so I know that something is missing from the ZT. I've changed settings around as well (brightness, gamma, etc.) so I'm not sure what's going on.