As you are in a different country to me I can't comment on cost bit I use a LG sound bar with subwoofer, cost me £230 5 year ago with my old LG tv and it has never let me down.
If you look for reviews on any you see that will help determine if suits your needs.
As long as it has Optical output, Bluetooth, decent output of sound power you should be OK.
Maybe your local outlet have a set up room for you to.try the sound and build quality?