Tracy, Nashville has a low-band VHF digital station: WTVF, which is the local CBS affiliate, and you have several other VHF digital stations, as well. The HDTVo is a middling-good UHF performer, but is likely inadequate for your VHF reception. Fortunately for you, all the Nashville stations lie in the same direction, due north of you, so you won't need a rotator, just a change of antenna, and perhaps a preamplifier if you plan to run two or more TV sets.
Assuming that you have enough space, I would suggest using a Winegard HD-7082P or a Channel Master Crossfire 3679. Both antennas have excellent VHF capability, and enough UHF reception that you should see all of the major Nashville stations well. If you like, add a Winegard HDP-269 preamplifier, which will be especially useful if you plan to run multiple TV sets from the antenna.
http://www.winegard.com
http://www.channelmaster.com
http://www.solidsignal.com
http://manuals.solidsignal.com/AntInstallGuide.pdf