Scott says there's a new Vizio sound bar subwoofer that is designed to fit under the couch. It's supposed to give the user a more immersive experience.
The Polk Magnify Mini is under $300 and is one of the top sound bars of 2018 which has surround sound.
A step up is the Yamaha YAS 207 for $300. Soundbars are not only for limited space or issues like apartment living, they're great for those on a budget who want that home theater experience beyond the lousy speakers in their TV. Just get one with a sub woofer.