IF you want HD channels and or hd locals you will need either a 1000.2 sat dish for 110/119/129 or 1000.4 sat dish for 77/72.7/61.5 sats. IF all you want is SD channels with no hd then a dish 500 will do.
Are the HD channels on 100/119/129 duplicated on 77/72.7/61.5? The reason I ask is they just put up a 1000.4 and now my 510 is incompatible. If I had a 1000.2, could I still use my 510 along with my 612 and 211k?
You have an Eastern Arc dish that only serves MPEG4 receivers, so for that dish the 510 is a doorstop.
If your locals are on 61.5, 110 or 119 you could have a D500 pointed at 110 and 119 and use a wing dish for 61.5.
If your locals are on Western arc, they should have installed a D1000.2
If you locals are on 72.7 or 77 you must have all MPEG4 receivers.