If your a member, try Costco auto purchasing program. My 3i Grand Touring was listed at other dealers for $23.5k, bought mine for $21.2k. For the $50 membership fee, its definitely worth it. You just have to go to the approved dealer which might/might not be close by. All this being said, I cant vouch if there are Costco's in TX.
I have come to hear that most dealers are pretty locked on their pricing since the internet keeps them pretty honest. Most people do shopping on vehicles online before purchasing and if dealership A is $1500 more for the same car than dealership B, people will find out. Do some research on Cars.com or even KBB. TrueCar.com also has a wealth of information on purchasing new cars. (https://www.truecar.com/#/