From what I've read in this forum....
Adding wing dishes for the new HD local DMAs is "Plan B".
Plan A includes AMC-14 (or a spare) and possibly another sat that will allow Dish to have ALL their content available in MPEG4 that can be seen with a single dish (AKA 1000.4) pointed towards the east.
Plan A was delayed by the problems with AMC-14 reaching the correct orbital position (yet). So you can wait for Plan A or go with Plan B in the short term.
Talon Dancer
There are 2 systems being set up. One in the east and the existing one in the west. The east looks to be 61.5 72.5 and 77. The west one is 110/119/129. Some markets may exist on both sets of satellites (probably the larger DMAs to give the installer more options at pointing a dish).
129 will get a new satellite at the end of the year. The specs are not known. It is just known to be a satellite with extensive spot beam capability. The spot beams will be able to carry a lot of markets, probably overlapping with E12 at 61.5.
Essentially all new LiL HD will be on 61.5 until 129 is launched, there may be space on 129 for more markets, but Dish appears to be saving the space for now, perhaps for national HD until the new 129 goes up.
Dish appears to be committed to duplicating all the national HD channels between 61.5 and 129. So, it depends on your market as to which set of satellites you will need to see. It is quite possible that soon your market will be on 61.5 only later to see it also on the new 129.
The new system set up in the east will probably be all MPEG-4. Since it is a new system they do not have to support all the old receivers.
If your market goes on 61.5 right now you will just get a 61.5 dish, they cannot install the new system yet since the satellites are not at 72.5 or 77 yet. Right now 61.5 is just a way to get your locals in HD if they are not on 129 (or 118.7, 110 or 119).