Did you copy our white balance settings? Those are unit-specific, so using those could explain why the colors look off to you. The rest of our settings will be good for any H6203 TV, though increasing the backlight setting would help make the picture look less dull. Try enabling 'Digital Clean View' in order to cut down on the fuzziness (though it is also possible that the fuzziness is related to the 'Sharpness' setting.
There's really not that big of a difference between panels. It's not something the average person is going to notice, so it's nothing to worry about.
And unfortunately, we do not currently review soundbars, so we can't offer you any specific recommendations for one..