Dell Home offers the VIZIO 55" 1080p 120Hz WiFi LED-Backlit LCD HD Television, model no. E550i-A0, bundled with a $150 Dell eGift Card, for $729 with free shipping. (The gift card will appear in your cart.) Assuming you use the gift card, that's the lowest total price we could find by $121, although we saw it for a buck less two weeks ago. It features a 1920x1080 (1080p) native resolution, 120Hz refresh rate, built-in wireless, LED backlight, and four HDMI inputs.
Note that the eGift card will be emailed to you in 10 to 20 days.