It may be "choppy" because you are getting simulcast interference, but it is also a very short tower, about 50 feet tall (I've seen it), so it might be a matter of terrain blocking the signal. If the 800mhz duck doesn't do the trick (try that first), then you will probably want to set up a yagi antenna on your roof or in the attic if you like. That should help things come in much better.
Go to Google Earth and put map pins on your location, and then at Tatum and Greenway. Then "tilt" the earth so you are looking from your house towards the antenna (be sure to elevate the map pin for the site to 50'. As you tilt the world slowly flat, you will see hills and other terrain rise up, and you should be able to see if there is anything in the between you and the tower. If there isn't, it is probably just a matter of simulcast interference, and aiming a yagi will probably be able to "shut out" most of the other sites other than the one you want (this is what I have to do). If it is a matter of terrain, there again the yagi will probably save you because it does so much better at picking up signal. Simulcast A (PPD) does NOT transmit from Thomson peak.
See this link to find the site locations.
http://www.radioreference.com/apps/db/?sid=2508