Another type of screen protector to think about...
I've seen quite a few pictures of shattered screen glass caused by impacts to the side of the display. In some cases, the forces used to cause the glass to shatter were surprisingly small; one user reported his screen shattered when he inadvertently hit the bottom edge of the display with his cell phone when he was retrieving it from the center console phone area.
I bought a rubber bumper type protector that surrounds the edges of the display. I can't remember where I bought it from, but it doesn't look too bad, and it has a very nice, reassuringly squishy feel to it. I think it was twenty bucks, which is pretty cheap insurance for a twelve hundred dollar display.