So, for clarification, are you saying that I will still receive all channels that I currently receive as well as the newly added HD channels that I am currently not getting. With the only exception being that LOCAL channels that I currently receive in both HD and SD, that with this new setup I will only receive them in HD...if I am reading this correctly then this is a no brainer right? why would I be concerned about getting SD versions of channels that I already receive in HD? My main concern is that I would lose channels by losing 110/119.
You will get all channels on eastern arc including your locals in both hd and sd , except for those that are in hd already. Eastern arc is just like Western arc for national content . Eastern arc does not have the latino pack channels as of yet , but if you had them , they wouldn't install eastern arc dish.
Now if you have hd or sd distants from AAD ,they are only available on 110 for hd & 119 for sd distants. So if you don't sub to distant networks or Latino pack channels, you should be just fine with Eastern arc dish.