I'm looking to switch back to Dish since my local cable operator, only moved to them to get some local HD channels, and I have an 811 receiver. Is there any channels that I won't be able to receive as it's a mpeg2 not a mpeg4 model? Now that Dish offers more locals and I want HD for the Superbowl Dish is my only alternative. I don't want to buy or lease equipment, and I have a Tivo Series II as well.