I too am looking into getting a 4k TV. My plasma is on the way out. It has a panel issue. So I'm starting the process of deciding what to get.

I am interested in getting one with Dolby vision or HDR10. Hope to have one in place by the time the 976 arrives.
65" is what I'm looking to get as that is the largest that will fit in the area over my fireplace.

Viewing angles are one thing I'm worried about going from a plasma to LCD.
_________________________
Main HT <> 976 <> 7200 <> Ultra-X12 <> sapphire ST2 mkII RF/LF <> sapphire SC center
sapphire ST2 mkII SBR/SBL <> sapphire SS SR/SL <> Verizon/DVR <> Vizio M70Q7 <> Oppo UDP-203 <> Amazon 4k Fire TV