Could I get into Brown University?

Think more in the range of a 3.7+ GPA and 700+ SAT/32+ ACT scores. Brown does tend to look a little bit more at the whole applicant than some of the other Ivies, but that's still the level of competition you're looking at...and even if you can manage it, there's no guarantee. You just have to put together the best application you possibly can and hope that they want someone with your particular combination of interests and talents.