I'm not particularly bothered by surround sound. I just think the speakers in the TV are shite.
I can take the sound from the headphone socket but it doesn't work off the main volume control, you have to fiddle about in various menus. There is no way (that I can see) of altering the volume of the audio out sockets. I suspect it has been deliberately designed this way in order to force people to buy the Panasonic home cinema thingy, which I have no intention of doing.