Do you have a clear shot for an antenna without trees in any of your directions?
Based on signal strength, the most promising direction is 232 degrees true, 248 magnetic, if there are no trees. This would give you WABI CBS on real channel 13, and WMEC PBS on real channel 9. These are VHF-High channels; it is the real channel that determines the antenna needed. There aren't many VHF-High antennas being made anymore so you will have to use a VHF-High/UHF combo antenna like the Winegard HD7694P aimed at 248 degrees magnetic.
http://www.solidsignal.com/pview.asp...enna-(hd7694p)
http://www.skywalker.com/catalog/Manuals/WIN1051.pdf
You probably will not be able to use a preamp for these two channels, because they are strong enough to cause overload. An FM trap might be required. WBFB FM 0n 97.1, 3.5 miles away, has a strength of -19.1 dBm that might interfere with VHF TV reception. See the Attachment.
This antenna
might also pick up NBC on 2 or 4, but don't count on it because it isn't designed for it. A very large antenna is needed for real channels 2-6, like the Winegard HD8200u.
http://www.solidsignal.com/pview.asp...=winegard 8200
The second most promising direction is 85 degrees true, 101 degrees magnetic, if there are no trees. This would give you WVII ABC/Fox on 7, WFVX ABC/Fox on 22, and WMEB PBS on 25. The larger Winegard HD7697P might work. You would need an A/B switch to change antennas; it is difficult to combine two VHF antennas. If your TV can add a channel after scan, it wouldn't be necessary to rescan when changing antennas. As an alternative, you could connect the second antenna to a separate tuner and connect the output of the tuner to the A/V input of the TV to avoid a rescan every time you change antennas.
Another way to add the second direction would be to use a UHF antenna like the Antennas Direct DB4E or DB8E for WFVX 22 and WMEB 25 and combine it with the first VHF antenna with a UVSJ, no switching required. You could use a preamp for this UHF only antenna and combine it with the first unamplified antenna with the UVSJ after the preamp power injector.