This Video of a Proscan TV demonstrates how it looks while playing Paradise Burnout and it looks great for the Xbox. It has all the necessary plugins such as 3 HDMI, VGA, Some Components inputs. Most users report that they are very happy with the Proscan tv.
The following video and comments from Youtube reveal that for console gaming this tv is not bad and that movies look excellent...
Here's a video showing grand theft auto 4 on a 40" proscan