Hi - signal is weak at your location. Maybe you'd want to try it at a higher altitude, like 50 and 100? Trees can be an issue, especially for stations that broadcast on UHF. Look at "Trees and UHF" here -
http://www.hdtvprimer.com/antennas/siting.html
The 91XG is a fine antenna, but I think the DB8e has more gain, even though it's less directional. It also sells at a 50% premium to the 91XG.
You might also think about a dedicated VHF-low antenna, which there are few on the market. Your ultimate setup may include WBRA or WCYB. This discontinued Antennacraft antenna could work for those stations
http://www.ebay.com/itm/Antennacraft...item4ae265dda9 ... others here may have better suggestions for you.