What is your plan if you end up with a stuck pixel? Will your online vendor get you a new TV? I think not. So, you are taking a risk albeit a small one by buying online. A stuck pixel or two is possible 1-2% of the time even with an Elite.
My local dealer said if it happens you are STUCK with the TV. Best Buy will replace it with no questions in the first 30 days. Imagine, a mega dollar TV with a stuck pixel in the center. I would rather have a 768P TV than one with one or two stuck pixels.
Of course, people like to play the odds when it comes to saving money. The odds are in your favor your Elite will be perfect. If however, you are one of the unluck 2% too bad for you.