ABC/CBS/FOX/NBC from NYC and LA are CONUS on ch 80-89, they also have MPEG4 versions on the NYC and LA spot beams. As for the RSN's I think some like YES and SNY HD are now on CONUS, MSG is rumored to maybe go CONUS and then again maybe not.
Now if you move to NYC or LA I don't know if you get the MPEG2 verison on the ch 80 range or just the MPEG4 spot beamed version.