I also bought the Sony X900F 65" TV for our townhome in Colorado Springs. This TV blows away my 60" Panasonic ZT Plasma in our Ohio home. Watching 4k and Dolby Vision(only at night as it is a bit dimmer but really beautiful) is such a treat!
The Sony X900F along with their top QLED models along with the LG QLED were the only models that bested the Panasonic ZT.
I just did the same - 55 inch Panasonic plasma moved to our bedroom after we bought a new Sony X900F. What an upgrade!