I have the opportunity to pick up a used DTC-100 locally for $150. It is a well used unit that seems to not have a properly functioning Direct TV tuner. Apparently, it has no problems with OTA broadcasts which is what I want it for. What are peoples experience with this unit? Can it properly upconvert ABC's 720p HD feed? The whole reason for this possible purchase is to watch the Superbowl in HD. I am not going to be able to return this unit if things don't work out soooo opinions, strong or otherwise, are welcome! Michael.