Low cost, great value:
Klipsch Cinema 600. MSRP around $600.
EBay open box prices in the $300-$350 range.
I got one a month ago and I’m more than pleased. HDMI-arc makes for easy setup, but if you prefer optical, it can learn your TV’s commands. It has a full featured, motion-sensitive, back-lite remote which I never need to use and a somewhat klugey but comprehensive mobile app as well.
The wireless sub has a 10" driver and a large wood cabinet.
It does lack a HDMI pass through, so if you are out of ports, you’ll need to use optical.
I’ve had Polk and Boston Acoustics soundbars in same price range over the years and there is no comparison.
It’s not offensive for music, has several voice modes and night modes. My wife, who HATES extra remotes or special routines for simply watching TV has no clue that anything is different other than great sound and effects you can feel.
Edit: I have the 3.1 version. They make a 5.1 version, but no atmos. You can start with 3.1 and add rear speakers later, if desired.
Edit 2: just read your last post. Have fun with your great new toys!!