Okay, for those who may not understand dish solutuins and what channels are available where:
A Dish 1000.4 is aimed at three satellite locations. 61.5°, 72.7° and 77°
A Dish 1000.2 is aimed at three satellite locations. 110°, 119° and 129°
If you have any combination of dishes one, two or three dishes that gets either set of three satellite locations, you get all the national channels. You don't need to do anything. You are all set. You get everything. Relax and forget any talk of replacing satellite dishes.
There is a difference in HD local channels and Regional sports channels available, but not national channels.
HOWEVER,
If you have an older set-up that mixes and matches from the two sets (Basically 110/119/61.5 which was a common set up for the original HD services and the long-lost, never forgotten VOOM channels), you will be missing up to 16 national HD channels now...and that will only get worse and not better as time goes on.