I bought a SR MBP and I have been patiently waiting for it to arrive. I realized that I can connect this to my 40" Sony Bravia (the exact one they have to display the Apple TV at the apple stores). I want to connect it to the HDMI with about a 20 ft. cable via the dual link. I have 2 questions. Where can I get a cable like this for a good price? And will having the TV as a monitor cause any burn in effect?