Truth about using Soundbar w/ Denon AVR
Truth be told, soundbars are not intended to be used with traditional AV receivers. For that you obtain proper surround speakers & sub. There's no such thing as 5.1 from any soundbar. Sorry.
For an good value entry level speaker/sub system, check out the Energy Take Classic 5.1 system (@ Amazon), or look at the Monoprice generic version for even less $ but decent surround sound. Just to see what you are missing w/ the overpriced Vizio soundbar.