Samsung flat screen TV’s

Ifyou want the best the LG OLED C ,or G seres best picture 
as well as super dependable I have owned 2 one newer the other 4 years old Fantastic , LG makes 85% of the screens out there in OLED screens ,and other companies design their own processors
or versions . The LG is the best OLED TVs and  better then any 8k , and if you want to see it at its best spend $350 to have it professionally calibrated which takes about 4 hours .there are many menus not available to homeowners as well as calibration equipment. The stores many times run special discs to Sony or others under contract I have compared them. All on a level playing field  and none are properly adjusted just average color temperature . 

You'll pay more for a Sony, but they are the only way to go for reliability and long life. Multiple Sony TVs owner for decades.

I have had the same results only one flat screen has had longevity and that was an early one with a subpar picture they are built as throw away items now sad to say.

My b.i.l. lost a Samsung within a year - lines on the display.  My 2 have been fine 5+ years.. My first in '08 was a Sharp - when I updated the firmware it would not start. They told me to go scratch.
My replacement Sony and it's 4K partner have been flawless with lifetime t/s last time I called them (years ago.)  Since 2010. All they've ever needed was a rare reboot

The answer is to get your TV professionally calibrated after you buy it. That way the TV does not have to struggle to produce a great picture. All TV’s in shops have their colour and brightness boosted. There is no way you should use these settings because they can cause burn-out too soon.