Currently have a Samsung UE55JU6400 which I have had about three years and have been happy with. This is one of the early generation 4K offerings and whilst happy with it I can't help thinking about changing with a limited cash budget. Considering a Samsung UE55NU8000, my question is will I see a marked improvement in picture quality without venturing up the price range to OLED/QLED. Our viewing generally consists of TV through Sky box, Netflix and 4K movies and Blurays through a Sony 4K player. Any opinions appreciated, particularly if anybody has done the same upgrade (not likely I realise!!) Thanks in advance.