Excerpt: This 55" 55EX640 replaces the 55EX620 from last year as one of Sony's hot selling mid-range TV models. It's got Sony's next to best picture video engine so it will not have as superb a picture quality as the HX929 for instance. The screen does not have the superior louvering feature that helps with anti glare properties either so it will shed some glare from in room lighting.
Summary: Sony's EX640 series is one of the better deals from the company, with decent picture quality and features for the price.
Pros: The relatively affordable Sony EX640 offers deep-enough black levels for the money and commendable color saturation. The design is attractive and the menu system is easy to use.
Cons: We detected a couple of uniformity issues, black areas can look blue under lights, and shadow detail isn't up there with the better TVs. The wireless dongle takes up a USB port. The SEN portion of the Smart TV interface is so slow that it's kind of a waste.