Hi
There are many TV brands out there who are competing with each other...you should demo the different brands and decide which one appeals to you in appearance, PQ and SQ....of course todays LEDs last between 3-5 years so warranty and after sales service plays an imp role.....so check all this.....stand at a distance in the shop where you would technically be viewing from at home.....check the PQ from all angles and connectivity options.....
Decide on the model and brand and features then buy it...if purchasing online, ensure that clearly Manufacturers warranty is mentioned and not sellers warranty....
Be patient and make a wise decision all the best......