Zenith HDV420 HDTV Digital Video Tuner / Receiver
Great Unit
I purchased this unit used just in time for the Superbowl and was blown away.  The unit picked up 6 of 10 local channels witha  cheapie indoor antenna.  I upgraded to the Zenith/Gemini Silver Sensor antenna and got 9 of 10 channels, all with good signal quality.  Reception with these is highly dependent on location so your antenna requirements may vary.  The HDV420 is easy to setup and easy to use.  Unlike many other units, you can change the resolution from the remote.  Also, the unit has both optical and coaxial digital out which allows for flexibility.  The only down side, no DVI out.  Most probably won't care but if you absolutely must have DVI, look elsewhere.