New TV

There's a whole range of factors that dictate picture quality- resolution, panel type, peak brightness, HDR certification, contrast ratio and more all contribute towards image quality, and then there's less tangible things like some brands simply design and manufacture better quality panels than other brands, even with their panels having the same specs on paper.

For a sub-£400, sub-50" TV, you really can't go wrong with getting something from eithrr Samsung or Sony with 4K resolution and HDR certification, they make the best quality screens and you can generally rely on whatever they make with those specs to be terrific. For this weekend, and probably through Monday too, you can find 43" models from Samsung for around £300 quite easily, while for £400 you can find things closer to 50" if you wanted to go larger. Sony are pricier, but with all the deals between black Friday and Cyber Monday you might be able to find something from them for within your budget.