The Sony HT-X9000F Soundbar.
I recently purchased a Sony HT-X9000F, along with an LG 55SK900 Smart TV. The Sony HT-X9000F was discounted by $200 (down to $399) at Best Buy during the Black Friday and Cyber Monday periods. I thought I would add my two cents on it because I ran into the same thing that the originator of this thread discovered regarding the way the on-screen menu works for this soundbar.
I only have two things plugged into my new LG television – my iMac is plugged into HDMI 1, using a Display Port to HDMI adapter in conjunction with an HDMI cable that's compatible with 4K. I use a dual display set up this way and it works great for me. The Sony HT-X9000F is plugged into the HDMI 2 port on the TV which is also the HDMI ARC Port. I changed the label of HDMI 1 to "PC". So I'm always either using the display that way or opening up the built in webOS Smart TV platform to watch things like Netflix and Amazon Prime.
I had a heckuva time trying to figure out how to bring up the sound bar on-screen display on the TV before finally discovering there's only really one way to do it. I have to switch to HDMI 2 to see it. I knew the sound bar was working even before that but just like the original poster I wanted some sort of visual confirmation, besides the lights on the sound bar itself, to indicate that button presses on the remote were doing something. I could not understand why the on-screen menu just wouldn't pop up in front of whatever I was doing, whether using my iMac or the smart TV platform. So I now know I just need to switch to HDMI 2 to get visual confirmation of changes to the sound bar settings if I need to. Then switch back to what I was doing. It's kind of strange but it's not a dealbreaker as long as the sound bar is working the way it should and sounding the way it should, and it does sound rather good for a variety of purposes. Even the virtual surround sound capability is pretty decent for what it is although obviously not as good as a true 5.1 or 7.1 setup.
The other quirk I noticed has to do with the LG Smart TV Netflix app. The sound kept dropping in and out with what seemed like whatever I tried to watch through Netflix. After spending a lot of time on it I finally figured out that each and every program you play through the LG Smart TV Netflix app has its own individual audio settings on its program page. There is a "audio and subtitles" option under the "Play" button for each and every program on Netflix. There are two settings within that menu labeled "English" and "English 5.1". Except for a few exceptions if I don't change that setting to just "English" I get the sound dropping in and out thing. And it always seems to be set to "English 5.1" with everything by default.
When doing a search within that Netflix app you can type "Dolby Atmos" and it will list all the programs on the service that support this. Most of them play perfectly with the setting "English 5.1" selected (which like I said it is by default). However I did run into one or two that exhibited the same sound dropping in and out issue so I had to switch those to "English" to fix the problem. It still sounds pretty good this way but from what I could tell I'm not getting the simulated 5.1 sound when doing this. I don't know what the problem is with those few. Maybe Netflix mislabeled them or something? I don't know. Either way I no longer have to deal with the sound dropping in and out issue as long as I change that setting back to "English" if necessary. Kind of a minor pain but just like the other issue above not a dealbreaker or anything.
It seems we are in a rapidly evolving home theater landscape so I imagine these kinds of things will get ironed out over time. And, of course, the amount of 4k HDR Dolby Atmos (whatever all the standards are) should increase rapidly.
That's my two cents regarding the Sony HT-X9000F.