This comparison is targeted at consumers that want 1080p HD-DVD for the lowest cost. This article does not include the price of the Xbox 360 for purposes of comparing the drives only. My goal was to determine whether the Xbox 360 add-on produced reasonably similar results viewing HD-DVD content to the standalone HD-A20. I couldn't find this kind of comparison elsewhere, especially not with newer HDMI-equipped Xbox 360s. The Xbox I'm using is a newer Premium/Pro system with HDMI and the Microsoft HDMI cable.