Hello, I have a questions that I'm sure this forum can help me with. Currently I have 2 dishes2 One is a Dish 500 and the other is one added so I could get HD locals. I have 3 rcvrs ( VIP722 VIP622 510D ). I want to swap out the 510D for another 722. I was told when I do this I could go from 2 dishes to 1. Is that true? Also, I was told there is a 722 model that does 1080p quality. Is that true? Thank you.