I have a $600 Samsung 5.1 system and it sounds amazing. However, for Christmas friends got us a Polk audio Soundbar/wireless subwoofer, look it up it's $500.. Out of curiosity I hooked up the Polk audio system and to my surprise it sounded infinity better.
Not only did it throw the sound around the room better, the bass hit harder, louder and the sound was more crisp. With that, I took down the 5.1 speakers, eliminating all the speaker wires (something I've been wanting to do for some time) and now just have the bar and woofer. Sound bars are a great system to own if you don't feel like wasting 7k on a system and prefer not to have speaker wire everywhere or forking over the cash for a 5.1 or 7.1 wireless systems.
The 3D sound field it creates is just as good as the 5.1 systems.