With CES 2017 going on, if the OP is still looking for a TV, I noticed a lot of the online sellers are marking down their current lineups to prepare for the 2017 sets. You mention an Entertainment Center; what's the maximum width and height of the opening? With the current sets minimizing bezel sizes, you may find that the 47" HDTV of five years ago can be replaced by a 50" set today (if you can find that size!)
Also, listening to the CES 2017 coverage, if you can hold out for another year or two, the company that provides the quantum dots technology to the OEMs like Samsung, Sharp, HiSense, etc., is reportedly coming out with a new range of materials that will further increase color purity leading to the elimination of the color filters in an LCD panel, increasing brightness and energy efficiency.
I just did a quick search on one site for 48"-50" 1080 120Hz HDTVs and the Smart TVs were cheaper than the non-Smart version. They were also all Vizios for the under $500 group.
Also, listening to the CES 2017 coverage, if you can hold out for another year or two, the company that provides the quantum dots technology to the OEMs like Samsung, Sharp, HiSense, etc., is reportedly coming out with a new range of materials that will further increase color purity leading to the elimination of the color filters in an LCD panel, increasing brightness and energy efficiency.
I just did a quick search on one site for 48"-50" 1080 120Hz HDTVs and the Smart TVs were cheaper than the non-Smart version. They were also all Vizios for the under $500 group.