For antenna, it is not complicated. There are several websites where you plug in your address and you can find out in about one minute's time what channels you can get with what type of ariel.
For the question about whether the 40+ channels are merely repeats, not for me. I get about 43 distinct channels. Some are "affiliates" with other channels--but some of these I did not get with my cable package so they are new to me. For example, I now get 5 distinct PBS channels, each with their own programming. Likewise, I get 4 ABC affiliate channels and several Fox affiliates. I also get things like: MeTV, Movies!, ThisTV, AntennaTV, Buzzr, Grit, a couple channels with "cold case" investigative programs, another old movies channel, a religious channel, several shopping channels, a couple of ION channels, etc. All in all, there's a fair number of movie channels and old TV show channels among these--right up my alley!
For the question about whether the 40+ channels are merely repeats, not for me. I get about 43 distinct channels. Some are "affiliates" with other channels--but some of these I did not get with my cable package so they are new to me. For example, I now get 5 distinct PBS channels, each with their own programming. Likewise, I get 4 ABC affiliate channels and several Fox affiliates. I also get things like: MeTV, Movies!, ThisTV, AntennaTV, Buzzr, Grit, a couple channels with "cold case" investigative programs, another old movies channel, a religious channel, several shopping channels, a couple of ION channels, etc. All in all, there's a fair number of movie channels and old TV show channels among these--right up my alley!