There is really no such thing as a ‘Digital antenna’ or a ‘HD Antenna’ - those are just marketing tools for old fashioned rabbit ears, rooftop, or attic mounted antenna. If you live in a fringe area, you probably need to add an in-line signal booster (some of the rabbit ears come with that as a built in feature). Aiming your antenna is a bit more important in the digital era than it was with the old analog signals. (Note- aluminum foil ears or balls on the ends of the rabbit ears still seems to help in some circumstances).
Unless you are rural, that should replace a surprising number of channels.
As for Hulu plus, Amazon Prime, Netflix, and other new services, I’ll leave that to others. I do wonder if the DSL will give you adequate bandwidth.