If you are considering buying a Playbar, keep in mind that in most cases, despite the advertisements, you will most likely not get true surround sound, even if you add rear speakers and sub. This is because most TV's can't output Dolby 5.1 through the optical port. Therefore, all you end up getting is better amplified stereo sound. Very little sound will even be transmitted through the rear speakers. Only way around this is to buy a digital optical switch which allows you to bypass the TV: https://www.monoprice.com/product?p_id=7974.
WHY DOESN'T THE PLAYBAR SUPPORT HDMI ARC INPUT? THIS WOULD ALLOW TRANSMISSION OF DOLBY 5.1 SOUND FROM THE TV TO THE PLAYBAR.