First of all, welcome to SDN. You'll find tons of information here that will help you along your way.
Getting your pharm tech certification is definitely a plus but actual experience, whether paid or not, in a pharmacy is very helpful. Go to your local pharmacies and hospitals and introduce yourself to the pharmacists there, let them know of your goals, ask them questions, try to familiarize yourself with pharmacy as a career. This can only help, especially if they allow you to volunteer. Eventually you may even get a LOR from one of them.
Since you have some time before you plan on applying I would make the most of it by becoming a well rounded applicant. Get involved as much as you can in community activities and volunteer work, as those strengthen your application immensely. I would say that with a GPA of 3.5+ and a PCAT score of 80+, you'd be a solid applicant. I believe the average GPA/PCAT for both schools hovers in the 3.6-3.7/79-84 range.
Although I have not attended classes yet, from what I saw at the interview and from what I've heard, Texas Tech has an excellent reputation of producing quality pharmacists and the facilities are outstanding. Yes, the location (Amarillo) may not be the greatest, but Amarillo has most of the conveniences of a large city, plus it is home of the Big Texan Steak, how awesome is that!!
Since I didn't apply to UT, I can't say much about it but UT has a top notch program and is in a great place to live. You can't really lose with either program as both will provide you with a great education.