I concur with BrownParent’s comments above, and can maybe add a few things:
Believe it or not, UW-Madison has been traditionally very strong in geosciences (though you don’t yet specify a sub-field, which is quite understandable at your age; indeed, it may change over time), and arguably a bit stronger than UT-Austin. Here’s a current example below. While I’d caution not to go overboard with rankings, right now you’ve got UW ranked at 20 globally for geosciences, UT-Austin at 36 (and Minnesota at 35):
http://www.usnews.com/education/best-global-universities/geosciences?page=2
I remember studying evolution, housed within geosciences at UW, with a wonderful professor, Dana Geary. She’s still at UW; her PhD advisor at Harvard was Stephen Jay Gould. In other words, you won’t go lacking in geosciences at UW, even though it seems so close to home.
I happen to love both UW and UT-Austin for many (similar) reasons. I don’t consider Texas A&M as a match, either in research depth, or overall institutional strengths as UW and UT-Austin, though I’m sure some specific disciplines at A&M are relatively strong. But structurally – not in the details of course, which clearly vary, even with peer institutions – they are so similar as to not warrant extra $$$ for undergraduate. If I had the resources and campuses in my home state, when I was young, as those of Ann Arbor, Madison, Berkeley, or Austin (to name some examples with roughly similar, outstanding campuses / towns / research opportunities), I would have been hard pressed to leave with admissions in hand and in-state tuition.
I know it is hard sometimes to imagine staying in your home state for college. But with your major, your admissions, and the resources UW offers, I’d personally save the money during undergrad. You can maybe think about taking some trips during breaks or even studying abroad for a bit if it’s within your budget, and going elsewhere for grad school. And many advisors will suggest precisely that, as academics often see it as an advantage to study elsewhere for graduate school. With good grades and some strong research background as an undergrad, you should be seeking full funding for a grad program.