Samsung, Panasonic, LG, Sony all make comparable quality tv's. Finding a store with a viewing room will help, 'Richer Sounds' may have one if you have a store close by. Also, someone to help set it up for you that will adjust the picture brightness etc to suit you.
Many tv's these days are OTT unless you play computer games or watch blu-ray (fancy dvd) yet skimp on things like sound quality. For most of us, a budget led tv with a decent sound bar will do everything that a top of the range one will.
If you like the look of a tv, it's resolution is full HD (1080p) and it doesn't sound terrible then it will probably do you fine. If you get a demonstration, make sure they are just using a normal TV signal. Many expensive tv's advertised look amazing with a blu-ray movie on but bang average when you just watch Gardeners World.