No issues with my 'old' Panasonic - in fact the low light stuff looked amazing. Personally (and this is for another thread perhaps) but I am mystified by the UK's obsession with 4k and the like (it was the same when HD came out). 4k may well mean quadruple the number of pixels and the potential for better than 1080HD but at normal TV sizes and viewing distances, this does not translate into better picture viewing or resolution (ask a photographer if you don't believe me). I have seen a number of 4k TVs that have a frankly appalling ability to display a black screen uniformly. When I bought my TV about 5 years ago, it was £1500 and you could buy a TV with equivalent numbers for less than £400. Want to guess which one has outstanding picture quality and which was poor?