There isn’t one golden rule when looking for the best TV. It may have the right size but not the right inputs. It may have the right inputs but not have voice control. It may have voice control but can’t be wall-mounted. You should look for all the features that are non-negotiable such as suitability for wall-mounting, smart technology or a 24" screen. Once you do that that you'll know which TVs are suitable and you can be persuaded by any additional features they have.