I am looking at two different Samsung models and would like some input on both of them. First is a UN55HU6840FXZA, and the other is a UN55HU6840. So you folks that own one, or you folks with more knowledge than me of 4K TV'S please let me know how they perform, or if worth buying. My living room is small, so a bigger TV would over power the room. I had a Vizio P50, but it died after 52 days, and Vizio would not repair or replace it, so I am done with them. Thank you in advance.