Colben,
First congrats on asking for advice while still in High school (I assume so because you're choosing majors); looks like you're getting a head start. So funny enough I was in the position as you back in high school and was admitted to both CS and ECE (Electrical and Computer Engineering) majors as undergrad. I chose ECE because it was more broad and I thought I could learn about both computer software and computer hardware whereas I saw CS as a specialization of ECE.
That said, since I work in finance now, if I could go back, I probably would have pursued a CS degree. The CS classes I took were immensely interesting and I had a lot fun programming some of the assignments (we wrote compression programs, chess algorithms, these experiences I've never forgotten). Plus, studying computer science in depth teaches you to think differently, for example being able to present a problem and end goal to a computer is not the same as presenting a problem to a human. I think this critical thinking and problem solving could be used much more in any field, just not in finance. Of course, in ECE you have a much wider knowledge base (I learned about computer architecture, signal processing, and circuits); all the technical details I learned from the electrical engineering part, I have mostly forgotten sadly. Still with the ECE degree I did get a lot of breadth.
Good luck with your studies in any case; to be honest, I wouldn't try to do a double-major. You could simply pick the major you find most interesting and then use your own time in college to pursue projects, like starting businesses or a part-time job as a campus tour guide (being able to present and make people like you is a great skill).
...by the way, do you feel comfortable revealing which university you're going? there might be others who are alumni..
