USC vs. UCLA vs. Cal / UCB for science and business?

My major at UCLA and Cal would be pre-immunology (MIMG at UCLA, Immunology and pathogenesis at UCB). Human Biology at USC. Also interested in either double majoring or minoring in something business related so I can ultimately do something related to both science and business. I know a lot of people are in my same position choosing between these 3 schools, so any insight you might have would be super helpful! Cost is not a factor.
Thanks!

So you plan on med school eventually?