Brown’s focus on undergraduates, its prestige and its academic flexibility make for a pretty amazing place to go to school. The fact that you get to take advantage of all three without paying (much) is pretty extraordinary. So I join the chorus of those recommending you strongly consider Brown.
I will say, though, that when you arrive on campus at Brown, prepare yourself for a major change of scenery from Orange County. Everything will look and feel different, from the architecture, to the vibe, even to some of the students (East Coast preppies.) The weather will be way different. The surrounding areas (Providence) will be way different.
Don’t let the initial shock put you off. Brown is a prestigious school and a great place to study for a reason. For many reasons! You will get used to the differences, and probably come to appreciate them.
Congratulations. You have an amazing opportunity.