My 6 year old Toshiba TW40x81 accepts 480i, 480p and 1080i. How do I determine it's native resolution? The manual does not tell the set's native resolution. My xbox 360 is connected to it and displaying at 1080i and when I pick up my HD-DVD player, it will be as well. Also, why can a 6 year old set display at 1080i and yet not support 720p? Is 720p that much of a stretch between 480 and 1080? Do any and all displays with component inputs accept a 1080i signal?