Hi Gel,
The firmware promised last March to enable DV/HDR via HDMI on you new Sony TV has allegedly failed to materialise - one of several reasons I discounted the A1 when demoing OLEDs. Android OS was another red flag. See the sloping stand that has been ditched for 2018 which was also a non-starter for me.
see discusion:
http://community.sony.com/t5/Television-General/When-is-the-Dolby-Vision-Firmware-update-going-to-be-available/m-p/670154
Meanwhile, the LG 65E7 continues to delight. None of your pops or clicks, the picture is certainly not "too dark" and Dolby Vision from Netflix and HDR on Amazon Prime are now excellent following firmware upgrades and carefull calibration. Guess your sister is over the moon with her good fortune as I am for purchasing an excellent TV for £1699. Old mottos -"Never look a gift horse in the mouth" and the "Grass is always greener" spring to mind.
I'm now retiring from the forum because of continuous ill-informed or disingenous critisism of other people's equipment. eg: Someone recently slated his one-time 55inch Kuro. I owned a 4th gen 50" and the last KRP 60". I do not recall a 55" ever existing. Panny did one.
Bye