Best 4k TV with a budget?

Hi. I’m looking to purchase a 4k TV to use with my PS4 Pro. To be honest i don’t really know much about TV’s so i need some advice. I see so many on various websites. Some priced at over £6,000 and some at a cheap cost of just £300. I have a budget of around £700-£800. Don’t really want to go any higher. Is £700...