
Samsung
Q990F
Value for movies and easy setup, but music falls flat.

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Wow.. no love at all for Sonos? Depending on the size of your living room, the Beam 2 is pretty good. I made a hobby of buying lightly used soundbaes, compare it against the Beam 2... Which ever is the better one, I would keep. I've gone through the Samsung 900A, the Klipsch cinema 600 with rears, polk something (can't recall). I did side by side comparisons using both music and movies and the Beam 2 was the preferred device in the household. But for larger rooms the beam felt weakER. I had a Sonos Arc and now have the arc Ultra. The Arc Ultra is pretty good and when you have more budget you can add a sub and rears.
Standalone or kit/surround? Price range? Adding a sub to any system usually improves midrange clarity a lot by offloading the low end from the main speakers. Room correction is also a good feature to look for to compensate for your environment and remove some echo/distortion. And many models also include dialogue enhancement or dynamic range compression/loudness compensation which helps with hearing words in badly mixed shows and not having background noise drown things out. The Samsung Q990F is probably the best overall at everything, but expensive. The D model if you can find it is just the slightly older one and nearly the same but often much cheaper. If you don't need the surrounds the Q900 is the same bar/sub. Q930/Q800 is one step down from there and still good. Q750 is another step down and has fewer features but was on sale super cheap recently. If you don't want a sub the Sonos Arc Ultra is also good but a little overpriced. The original arc is available refurbished for $399 from their website which is a pretty good deal if nothing else is still on sale. Though note room correction is only available via the iOS app for them.
My 9.1 sounded amazinf for 1 day, then right detachable speaker started popping and making static sound, at full volume. reset, unplugged, finaly returned. Bought Samsung Q900 (no rears). sounds great.
Q900. Same bar. Same sub. No rears.
I’d find power for the Samsung. Big room you want some big sound. I only have the 990 in two smaller rooms. One is my master BR, but it rocks. I’m sure it would do great in my living room but I have a proper setup there.
This is not a beginner setup in terms of Soundbars. This is one of the best probably the best Soundbar overall you can buy. There are far more expensive ones but none of them as good as Samsung Q900 Series period.
A Samsung Q700 Series Soundbar system would do just fine in that room. I have a 900, 800, and 700 system in various rooms of my home. The 700 series on 50% volume will shake a bedroom like that. Obviously, if budget is no option then always go bigger and adjust power as needed. But, if budget is a concern, their 700 series stuff is very impressive for a smaller bedroom.

Samsung
Q990F
Value for movies and easy setup, but music falls flat.

Sonos
Beam (Gen 2)
Compact value, but virtual Atmos and app issues.

Samsung
HW-Q990D
Powerful, immersive value, but poor music and buggy software.

Sonos
Arc Ultra
Immersive Atmos and bass, but pricey and poor for music.

Samsung
Q930F
Strong value for movies, but music and HDMI 2.0 limit.

Ranked #1
Sonos - Beam (Gen 2)

Ranked #1
Samsung - Q990F

Ranked #1
Sonos - Arc Ultra

Ranked #1
Sonos - Playbar

Ranked #1
Sonos - Arc Ultra