If you're going Sony avoid the AF8, the cpu is underpowered which makes the OS slow and unresponsive.
The AF9 is mucho moolah at the moment, tough call to justify an extra £1k. It does have a better cpu, so doesn't have the problem of the AF8. It has the funky A frame type stand though - so if you put it on a cabinet it needs to be quite deep (39cm) and obviously will tilt backwards. If you wall mount its nearly twice the depth of other TVs.
Also note both the Sonys do not have HDR on the youtube app and apparently the other apps are a bit iffy. HDR isn't great either due to strong dimming.
Panasonics do not have dolby vision and some (if not all) only do 4k over 2 HDMI ports.
The AF9 is mucho moolah at the moment, tough call to justify an extra £1k. It does have a better cpu, so doesn't have the problem of the AF8. It has the funky A frame type stand though - so if you put it on a cabinet it needs to be quite deep (39cm) and obviously will tilt backwards. If you wall mount its nearly twice the depth of other TVs.
Also note both the Sonys do not have HDR on the youtube app and apparently the other apps are a bit iffy. HDR isn't great either due to strong dimming.
Panasonics do not have dolby vision and some (if not all) only do 4k over 2 HDMI ports.