Vizio’s M7 series of 4K TVs show remarkably accurate color out of the box, but contrast levels aren’t quite up to snuff. Vizio continues to carve out its space in the TV market, offering attractive designs and solid performance for significantly less money than comparable screens from brands like LG and Samsung. At $799.99 for the 65-inch M657-G0 we tested, Vizio’s midrange M7 Quantum series is less expensive than many big-name models out there, as well as TCL’s Editors’ Choice 6-series. It offers some of the best color performance we’ve seen for a non-flagship TV, but its relatively dim picture makes it feel a bit overpriced. Editors’ Note: This review is based on testing performed on the Vizio M657-G0, the 65-inch model in the series. Apart from the screen-size difference, the 50-inch $449.99 M507-G1 is nearly identical in features, and we expect similar performance. The M7 looks minimalist and simple, with narrow matte black plastic bezels measuring a quarter of an inch on the sides and top, and three-quarters of an inch on the bottom. A metallic Vizio logo sits on the lower right corner, with an infrared sensor and small status light...