I've had my Elite for over three years now, and I haven't had any issues at all with it except the one time RRoD.
I know your a 360 owner. Have you ever had flickering on your display. They're like wavy lines going through the screen and then it will get worse. I've tried switching the HDMI cables, as a matter of a fact I just finished watching Alice in Wonderland on a Philips DVD player, and it wasn't acting up and was fine when watching it.
I don't suppose you've ever heard of this or have any solutions?