Costco offers its members the Hisense 55" 4K 2160p 120Hz LED LCD WiFi HD Television, model no. 55T880UW, for $499.99 with free shipping. (Non-members will pay $25 more.) That's $370 less than our July mention of a refurbished unit (this one is new) and the best total price we've seen for any 4K HDTV in this size range. (It's a current price low by $350.) It features a 3840x2160 resolution (four times that of 1080p TVs), 60Hz refresh rate, edge-lit LED backlight, WiFi, access to Netflix, Pandora, and YouTube, USB, and four HDMI inputs.