4ktv hdtv

Hi all, I am looking for a new TV in the region of £250-£350. I am looking through TV's as they all seem pretty much the same but at some point I will side load some other apps on to it. Can anyone recommend anything? This is what I am currently considering...

Picked up a new xbox one x I did have a 4k android sony bravia...did being the key word but will not go into that lol. Looking to get myself a decent 4k uhd hdr ready tv/monitor prob around 49" dont wanna break the bank but dont wanna be left with piece of pish.. any tips on what to look for or...