The Yamaha YAS-109 gets good reviews and can be had at accessoriesforless.com for only $130, and if you can stretch to $250 it includes a subwoofer that’d probably up your enjoyment factor a bit if you don’t already have a sub. Best of luck.
If you don't want surround sound and just want to hear your tv better in stereo sound, I bought the Bose TV Speaker soundbar. It's on sale at Amazon right now. Has a dialogue mode for clear voice and switchable extra bass