The Zenith DTT900 Digital to Analog Converter Box has really been a great investement. It is normally priced at $70, with the free card provided by the government, the price was only $30. The pictures are clear, the setup is easy, and navigation is dummy-proof.
The only downfall in my opinion, is that you still need a regular antenna. We had to purchase a new antenna that had great signal ranges. Because we live under a hole bunch of trees, reception is not great and we don't receive a lot of the channels we could if we didn't have trees. I wish there was a way that it didn't need an antenna