Well, I don't know how much this will help, but I can tell you that the antenna is only part of the problem. It has to be facing the right direction, and some channels come from different towers, so you may need to change the direction of your antenna in order to get better reception. Mainly, the towers are in the Cedar Hill area so point them in that direction. Also, a multi-directional antenna will be best. Also very important is how high up your antenna is, how many trees are in your yard, where in the house the antenna is (very interior areas have a harder time getting a signal than areas close to an exterior wall).
We don't have cable of any type and we've been testing out reception with our antenna for about a year now. The short answer is, unless you are willing to mount an antenna on your roof or in your attic, you might have to just suffer with the so-so reception for a few weeks. I HATE our reception but it's better than paying over $500 a year for something that is available for free anyway.
Good luck, hope that helps.