Over-the-air (OTA) reception plays a minor role in HDTV. Most people get programming signals from cable or DSS dishes, or off the Internet.
I happen to own a high gain rooftop OTA antenna with an antenna rotor, installed ten feet above my chimney, supplementing my DirecTV dish. I enjoy many of the OTA broadcasts and don't care for the fact that the subchannel programming is not carried by the cable and DSS providers. Quite often I find the subchannels have more compelling content than do the main channels.
I live at the extreme Southern tip of Silicon Valley, and my 60-odd OTA channels are clustered on three different headings on Mt. Allison, Mt. San Bruno, and a massive broadcast tower called Sutro Tower. That is why I own an antenna rotor. If OTA broadcasts were my only signal source I would probably own more than one antenna with signal combiners that would mix the broadcasts on various frequencies and headings into one antenna cable.
The key to good reception in a fringe area is to consult with a skilled antenna specialist who will design and install an OTA antenna system for you. He will consider your location and distance from the broadcasts, and also the terrain around your house and the terrain in between you and the broadcasts.
Differences in performance between HDTV tuners are relatively minor, and the key to suppressing the multipath signals you mention is a good high gain and highly directional OTA antenna.
For explicit advice on receiving the HDTV stations in your area, go to the AVS Forum "Local HDTV Info and Reception" and seach for a thread with the title "Twinsburg, OH - OTA". If you cannot find one, try searching for other nearby towns.
Edited by Gary McCoy - 6/21/12 at 8:52am