The DirecTV site doesn't list any models at all. It just has a generic picture of the HR20. When you order from DirecTV, you will get an HR21. If you go to a store, you will most likely only find HR21s. Aside from the lack of an OTA tuner, the HR21 is exactly the same as the HR20. Unless you really want a black receiver, there is no reason to switch from an HR20 to an HR21.