The antenna I got was this one : http://www.jpole-antenna.com/shop/aviation-airband-118-128-mhz-j-pole-antenna/
It's an 80 inch pole and that works great for getting it over the top of my shed I have. So far only complaint I have is I probably still need a little more altitude on it since there is rare occasions when ground planes do come in with some noise. At some point when money and time permits I will probably see if I can raise it higher.
Right now I'm about 3 miles from the center point of the runway about 200 degrees from it so I get the planes leaving perfectly.
As for Houston ctr I haven't yet had a chance time wise to test it. My guess is I would be able to pick up the planes up high within probably a 15-30 mile range (so far thats what I have been getting on the tower range). So if that were mingled in with the signal from Houston I'm sure it would help out this direction. As of right now I just would need a splitter and another tuner and I bet it would work. When I get some more time I will test it out. Right now time has not allowed me much freedom for my hobbies....