So I ordered 2 of the 211z receivers to purchase for a rv. Just using an older 1000.2 with the eastern lnb on a tripod. I ordered them right from dish and are supposed to be activated on our account when they arrive. I haven't received them yet, but the invoice says they are shipping me the 211k models. What's the difference between the 2? They are being used on HD flatscreens with hdmi inputs. If I do get the 211k, should I call and tell them I ordered the 211z? They were $50 each, so we aren't talking a lot of money, but I don't know the difference to know if it's worth it or not. They actually told me the 211k were $150 each and the 211z were $50 each.