Dell Home offers the Sony 48" LED-Backlit LCD Smart HD Television, model no. KDL48R510C, bundled with a $150 Dell eGift Card for $498 with free shipping. (The gift card will display in your cart.) Assuming you use the gift card, that's the lowest total price we could find by $150. It features a 1920x1080 (1080p) native resolution, WiFi, two HDMI inputs, and USB.
Note: The eGift card will be emailed 10 to 20 days from ship date.