I recently spent months looking at a new TV to replace my old, Philips LCD and finally settled on the 195cm (77") Sony A80J. It was a close call between that and the LG C1/C2. The A80K is the new replacement model but is basically the same with some minor changes.
The main reason I chose the Sony was that it runs Google TV (as opposed to WebOS on the LG). The interface is snappy with plenty of configuration options for those who like to tweak the settings. The Sony also supports DTS:X and 5.1 DTS via ARC/eARC, which the LG did not. I primarily use the Plex and YouTube applications to view my content these days (I did away with the discrete Kodi box completely), but you can also get all the usual apps like Netflix, Stan and all the Australian free-to-air streaming platforms from the Google Play store.
I positioned my TV directly opposite a large window and the glare is minimal. It's also perfectly bright enough to overcome the natural light coming in (in fact, I had to dial down the brightness a bit). The picture quality is absolutely phenomenal and even a few months after owning it, I still admire how good it is, especially viewing some of the older SD content. What ever secret sauce Sony use in their image processing, it's second to none.
I found RTINGS.COM to be an excellent source of information as well as side-by-side comparisons in great detail.
My only gripe with the Sony (and indeed many other TVs) is that the wired ethernet connection is only 10/100 Mbps (not gigabit). On some of the very high bitrate 4K content, 100 Mbps is easily saturated and not fast enough to keep up. It does however support 802.11ac, which is much faster than the wired ethernet if you have a decent wireless access point and RF environment.
I have no comments on the built-in speakers as I've never used them. I have it connected to a Sonos Arc soundbar (and associated speakers).