You have strong stations coming from two different cities, and in different directions. You don't really need the gain that the DB-8 offers, and,because of it's high-profile to the wind, you may be better off with a yagi-type antenna. Since one of your FOX stations operates on channel 7 VHF, and KCAU-DT will change to channel 9 after February 17, 2009, I would look for a small VHF-HI-UHF yagi antenna like a Winegard HD7694P, which is compact and plenty powerful, and also use a rotator like a Channel Master 9521a, so you can turn the antenna between the two different cities so you can get more channels.
http://www.winegard.comhttp://www.pctinternational.com/channel ... lation.pdf