Buy the one from a place w/ good return policies or very good customer service.
After reading this forum, I've discovered that EVERY LED TV out there has issues. Then it comes down to how sensitive you are to the flashlighting and clouding issue that seems to plague every edge-lit LED TV in existence.
For many people, it doesn't bother them. Just look at the rave reviews on Amazon and Costco. For others, it bothers them and the first number they call after they set-up their TV is not their BFF's to come watch their new TV, but to a manufacturer's service center number. Samsung, LG, Sharp, Sony, etc...they all have problems in every single model.
I just got a Sharp 60" LE832U from Costco which has easy no-hassle 90 day returns, 2 year warranty and 3 more years from Squaretrade for $99. I'll probably post an update tonight after I have it set-up. My fingers are crossed that I won't have any problems and if there are, the problems (probably a little cloudiness) are something I can live with. Costco reviews gave it rave reviews. Amazon reviewers had the similar 833U and it had rave reviews. AVS'ers, and I count myself in this group, tend to be a lot pickier than the average lay-person. That's why we're all on this site
Not to sound too jaded, but after pouring through multiple LED TV threads, eventually, you'll just have to pick one and pray it doesn't have any problems. For a 60"+ TV for under $2000, you'll quickly find that you don't have too many choices. Since they don't like us to talk price too much here, I"ll go out on a limb and say to check the usual electronic B&M's plus the internet vendors or just use Google's price checker and you'll quickly find out what options you have for under $2000.
Good luck with your search
Correction, 46-55" you have lots of options for under $2000. Do you want 3D or not? There are at least 20+ decent models to choose from in your range as opposed to the 5-6 for 60"+ under $2000...LOL.