Dell Home offers the Sony 43" 4K 2160p WiFi LED Smart Ultra HD LCD Television, model no. XBR43X830C, bundled with a $150 Dell eGift Card, for $798 with free shipping. Assuming you'll use the gift card, that's the lowest total price we could find by $150. It features a 3840x2160 native resolution, streaming apps (with access to Netflix, Hulu Plus, Pandora, etc.), PlayStation Now, WiFi, USB, and four HDMI inputs. Deal ends October 13.
Update: Specs corrected.