Maybe it's time for an upgrade? There are a lot of great TV events coming up over the next few weeks — including the NCAA March Madness tournament and the final season premiere of Game of Thrones — that you simply have to watch live, so you don't miss out on all the action or get spoiled on jaw-dropping TV moments.  SEE ALSO: Save $18 on a TV wall mount that makes installation a breeze Catch up on all your favorite TV shows with these deals on amazing 4K TVs that we found on Amazon, Walmart, Best Buy, and the PCMag Shop. If you're thinking about upgrading your old TV set for something new and shiny, we rounded up deals on the top 4K TVs from Sony, Samsung, VIZIO, LG, and more. Now is the best time to upgrade and save. Read more...More about Samsung, Sony, Lg, Vizio, and Mashable Shopping