Best reliable/dependable TV under 400?

Hi. I'm looking to get a 50 inch (or even 55 in) TV under $400. I'm going to be using it for casual gaming and watching movies and shows. I want the best overall, but really the most important thing for me is reliability/dependability. I want my TV to last at least a few years without any problem.

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Thank you.

In that case, what's the best value 50" TV?