Just picking up on some point's I missed from this reply,
@thisisthecount
There isn't really a 'HDMI 2.1' cable, but think there should be. It bugs me that the circuitry behind the ports (sockets) are referred to by the various numbered HDMI standards e.g. 1.3, 1.4, 2.0a, 2,1b, but the cables are simply
High Speed, Premium High Speed, and Ultra High Speed. There's no natural synergy between the two naming systems. No wonder resellers started slapping on HDMI X.Xx
The audio signal doesn't need anything fancy. A
High Speed cable should be enough, but anything labelled 'HDMI 1.4' or higher should nail it.
For sound, going too slim is not your friend. Slim means limited space for speakers, and that in turn means speakers that produce very little of the midrange frequencies, mostly just the higher frequencies. When that happens, then either the sub is used to try and fill in, but then you get the effect where part of the dialogue sound is coming from the sub and a bit coming from the sound bar, or they just leave a hole where a chunk of the midrange should be.
The Q930 is significantly better than the S800B. It's worth the extra.
Any TV with a HDMI 1.4 or higher HDMI spec should support ARC. It has been out since 2009, so that's well over a decade.
HDMI 2.1 is the standard where eARC started to be supported. Officially it has been available for about five years, but it took a little while for it to trickle down from the higher end models to the midrange products. Because of licencing costs, there are some budget products that only support ARC, so this one is worth double checking.
Think "lift shaft between floors" - It's a vertical shaft with entry/exit points at different floor levels. You don't see the shaft because it's hidden behind the wall, but it makes it easy to travel from one floor level to the next. 'Travel' in this instance means pulling the old cable out whilst pulling a new cable through. The shaft has to be large enough in width and depth to accommodate the HDMI plugs plus allow them to pass through what is effectively a 90 degree bend at the lower and upper access points as they're being pulled.