Why just buy a HDMI cable and then go Own-It/Rate things like a PS3, Speakers and that fancy Harmony Remote. Maybe even add a 5-yr Samsung Warranty to your Wish List.
I have pretty much decided on the 650, but like to get an extra $50 off if possible too.
I never come across forcing an item into Amazon Gold Box for better price. Purchasing from Amazon is already a steal with a HIDDEN offer - FREE Shipping + INSTALLATION. Delivery guy will unbox your tv, plug everything on your tv rack to make sure everything is working fine. He will also help you to throw the empty box if you do not want it.