Misfit, please DO update us with your findings! I will look forward to your report.
oldskool, do you mean that a HD DirecTV box has a OTA HD Tuner in it? Would such a device output video to a non-HD TV (like S-Video or component video)? Are HD signals easier to capture than regular VHF signals? I had trouble getting a "good enough" VHF signal without a rooftop installation.