Let's get serious here: if you want good TV reception, especially if you plan to run multiple TV sets in the house, you really need to consider a roof-mounted antenna. Channel 7 and 9, your 2 VHF digital stations lie in the same direction, but your UHF channels are scattered in a variety of different directions, and if you want to get them, you need a UHF antenna that has a wide beamwidth. I have an inexpensive solution that will solve your reception issues, be durable, and can be expanded to connect all of the TV sets in your house. It can be mounted on a chimney, or eave-mounted without being obtrusive.
Use an AnrennaCraft Y-5-7-13 VHF antenna aimed at 300 degrees, and mount a Winegard HD-4400 UHF antenna 4' above it on the same mast aimed at 320 degrees. Combine the output of the two antennas using a Pico-Macom UVSJ UHF-VHF antenna joiner, then run the coax cable through a grounding system, then into the house where you can then run it directly to one TV set, or through a splitter, then run to 2 TV sets. If you plan to run more that 2 TV sets, run the coaxial cable from the antennas to a distribution amp-splitter like a channel Master CM3414, which will power up to 4 TV sets, ot a CM 3418, which will power up to 8 TV sets, then run your cabling to eact TV set in the house. You'll enjoy perfect reception from ALL the DC stations without a hitch.
http://www.winegard.com
http://www.antennacraft.net
http://www.channelmaster.com
http://www.solidsignal.com
http://manuals.solidsignal.com/AntInstallGuide.pdf