Been watching this TV for a while and it's the cheapest I've come across so far.

It's certified UHD premium which should give a bit of future proofing.

From the blurb:
Be blown away by the brilliant brightness of Samsung’s Quantum Dot display. Boasting top-shelf HDR, crystal-clear 4K and crisp moth-eye technology, this set’s explosion of colour will change the way you look at your media. Coming with a revamped Smart platform, you’ll enjoy console-less gaming on Playstation Now, control your home through SmartThings and access all the apps you’ll ever need. Finished with a chic branch feet design, the KS7000 is a monument of entertainment technology.

Eye-Popping HDR 1,000
Forays into colour-boosting High Dynamic Range (HDR) have begun, and Samsung are one of the forerunners. As members of the newly-founded UHD Alliance, they've delivered top-of-the-range HDR with a staggering 10-bit colour depth. This means that there are over a billion individual colours to deepen your view and show shades you’ve never seen in home entertainment before. Samsung's HDR 1000, indicating over 1000 nits of shimmering brightness, gives a glorious glow that will knock your socks off. Usually, studios are forced to dilute the colour of their shows and films to fit on our TVs. Now, HDR screens like the KS7000 can channel content from studio-to-living room with the same precision and utterly otherworldly hues.

Razor Sharp 4K
To respond to screens getting bigger, brands have packed their screens with more pixels. This 55-inch screen has four times the number of pixels than 1080p HD TVs, delivering stunning realism, natural motion and incredible detail. Experience this high-spec picture across a range of broadcasts, movies, sports and more thanks to 4K upscaling. As it converts lower resolution content to near-4K quality, anything you watch on the big screen will be truly extraordinary.

Vibrant Quantum Dot SUHD Display
Samsung add even more colour to their HDR and SUHD with a mass of super-tiny nanocrystals that give deeper shades. This tech delivers 30% more colour accuracy and 64 times more gradation to each pixel than standard sets. So, the KS7000 will give your living room an insane lustre that plunges into the delightful depths of every show and movie.

Ultra-Black Moth-Eye Technology
Embrace blacker blacks, whiter whites and an all-round contrast bonanza with Samsung’s new Ultra-Black tech. The KS7000 absorbs natural light in the same way that a moth does to see better at night, so your set won’t suffer from frustrating glare. This way, you won’t need to close your curtains to keep colours sharp. Furthermore, this TV’s Peak Illuminator Pro doubles the depth of blacks of standard 4K, giving your home-viewing premium polish.