Greetings, I am located in the Minneapolis, Mn area. I've been a Dish subscriber for about 9 years now. I have an old 510 and 4900 receiver (owned) which I want to change into 722 models as I am looking for dual tv signals and DVR's. I currently have the AEP package. I'm not sure that I want to add HD service right now but may be interested in the future. Can I continue using my Dish 500 antenna (feed horn says "Digital LNB" and it has 2 horns where the coax cable can screw in)? Does Minneapolis service require a new antenna, like the 1000.2 or 1000.4? Does Dish have any promotions for long subscribers where I can get 2 discounted 722 receivers? Should I be looking for a 722 or a 722K? Thanks for any & all assistance!