You could get the CM-7001 HDTV tuner, $139 new.
http://www.channelmasterstore.com/HD_Antenna_Tuner_CM_7001_p/cm-7001.htm
Not many more of these left still being produced. I have the Samsung DTBH260F, and highly recommend it if you can find one. I also have a Zenith HDV420, but it's ancient...