Pulled the trigger on a new LCD 4k TV. It's the Vizio E70U-D3.
I chose this one for the upscaling feature, since I still have the 975 in place, and the Wi-Fi connectivity.
The ARC input can upscale from 1080p/1.4, and I like the picture quality of the Vizio.
The viewing angle is 176°. I mounted it over my fireplace and it fills that spot as the biggest that will fit there. I initially thought a 65" would be the largest that would fit, but no.
Had to run two HDMI cables through the wall. One for hook up to the 975 and the other, HDMI2.0, will be for a 976 when that arrives