Honestly you still kinda can, just instead of going into the store, go to Rtings and just find the TV that is the size you want, has the features you want, and is currently the highest rated on the site.

They have incredible reviews that go into very minuscule detail which, if you aren’t a TV person, will mostly mean nothing to you. But look at the scores at the top of the review, and read the little blurb to make sure there aren’t any deal breakers for you. And then just order it from whichever big box store in your town has the best deal.