I have a 47SL80 and just bought a Sony HTCT60 soundbar at Costco for $125 plus tax. It comes with a subwoofer. Not a lot of power but it sounds good in our small space and the price is right. It has analog, coaxial, digital inputs. And to my surprise it came with cables(analog, digital coaxial, digital optical).
I tried searching for reviews but couldn't find any, but the Sony web page says this model, HTCT60/C, was made for Costco.
There is no LCD screen on the unit to see the settings, you have to hit and miss with the remote.