The name Sony is synonymous with high-performance televisions, but the X850D series isn’t one of them. Compared to its peers from Vizio and Samsung in side-by-side comparisons, this relatively affordable bearer of the company’s “XBR” moniker fell well short, with worse contrast and impact overall.

In my book contrast is the most important aspect of image quality, and image quality for the price is the most important factor in choosing a TV. If you judge it by other factors, however, the X850D brings a lot to the table. Its features include 4K resolution and high dynamic range (HDR); its sleek, minimal design goes with pretty much any decor; and its Android-based smart TV system is one of the best — good enough that you probably won’t need to connect an external streaming box.
…
Read full post here:
https://www.cnet.com/reviews/sony-xbr-55x850d-review/