Amazon offers the Philips 50" 1080p LCD HD Television, model no. 50PFL3807/F7, for $598 with free shipping. That's $82 under our August mention (for Costco members only) and the best price we've seen for a WiFi-enabled 50" HDTV. (It's a current low by $81.) Features include a 1920x1080 (1080p) native resolution, 802.11n wireless, Net TV with Netflix, VUDU, Film Fresh, and more, three HDMI inputs, and more.

Of note, Sam's Club members can get it for the same price.

Update: Of note, this isn't LED-backlit as previously mentioned. We apologize for the error.