I just removed an old Sony soundbar, and replaced it with KR Rokit 5's on stands at each side of the TV, and the matching KRK 10" subwoofer.
These are self-amplified speakers, with lots of eq options built-in. I'm controlling volume right from the TV set, thru a 'headphone' audio out port. Add an inexpensive graphic equalizer if you feel the need to tweak sound for room problems or personal taste.
In my 18' x 22' with 12' peak ceiling, these sound great on music, and on properly-recorded video. (There's a LOT of improperly recorded sound in tv-land). They can go to 'too loud' easily.
BH Photo Video online will get you started on self-powered 'monitor' speakers, which are designed to be accurate in reproduction, not favoring lows, highs, or what-not.