Here's to being old and overexperienced schoolwise. . .
I have attended UT-Austin; Texas A&M and U of Houston. You really have to look at yourself and what you can do. Each of these schools is excellent in providing a solid science background, ample opportunities to get involved in extracurriculars and proximity to medical facilities for shadowing/volunteering. That said, if you are looking to move out of mom & dad's and want the big city experience, head for UT. If you want the small town, close knit feel, head up 6 to A&M. If you can live at home without driving yourself or your family crazy, stay at home, save your money because you will certainly just add to your debt load if you head away from the nest.
I did my post-bac classes at UH to get prepared for the MCAT and prereqs. I also have taught chemistry in public schools for the last 13 years. Dr. Bott for general chemistry and Dr. Bean for organic are two of the best educators that I have ever taken a class from. And I have been trained to evaluate that kind of thing. The physics classes were a little shaky, it depends on the trig or calc route. The bio classes were fairly strong although the TA that you get for lab can be a real headache.
While my undergrad heart that graduated from Texas A&M says go there, my more mature self says don't go into debt, stay at home and get a great education at UH. Ouch, it hurt to say that and I think they are revoking my Century Club membership at this moment.
Also, I took a class that was an independent study class at Texas Children's ER department that focused on medical reseach. It was absolutely amazing and it was through UH.
Hope this helps.