I have very limited experience with sound bars, but I am happy to give you what knowledge I do have.
My TV's are Sony and I happened to get a couple of their soundbars on sale, so I didn't pay the price listed. I got THIS
sound bar for $150 almost 3 years ago. I have to say that the sound is awesome!
I am coming from a Yamaha receiver with a Polk Audio RM 5.1 set that I absolutely love. I am sure there is a new/updated version of that soundbar, but I haven't looked for it.
I ended up with the soundbar for the simple fact of simplicity with something much greater than the crappy TV speakers on our TV. It made the wife happy, so it was worth the change. I have to admit, I am still very much happy with the overall sound experience from that bar. I have since "upgraded" to one of their higher tier sound bars, and the difference in the system was about twice the price, but almost negligible sound difference.
I have heard good things about some of the Vizio sound bars as well as the Pol Audio (they are always good in audio).
I will have to do a search again, but this is what I know off the top of my head. Amazon is a descent place to look for some quality units.