If you only have a 625 and are looking to upgrade to HD (as your PS seems to indicate). You would need an ota for you HD locals and a model 942 (if keeping two tuner dvr with just sd package, 921 would work if you don't want seperate outputs for two tv's.) A seperate 811 would work as a non-dvr single tuner (dish is using a different model number if getting from them.) If you want the HD package (platinum, gold, silver or bronze) then you would need either a 622 or 211/411 with a satillte upgrade. These models would work with ota antennia as well.