We are going to convert all of our (four) television sets to flat screen, high definition. We are with DirecTV. I have spoken with them and as soon as we get the flats, they are ready to come out and do their switchover number. I know zero about HD - so please help me out here. Which is better: Plasma or LED? Which name brand is best? Samsung? LG? Sony? Other? What is the best resolution to get? Anything else I need to know? Thanks in advance.