UCSB vs UCI vs UCD economics

I am accepted to UCSB for pre econ accounting and UCI for Business Econ; and waitlisted to Davis for Managerial Econ.
At first I really wanted to go to UCI for its business school for Business Administration; unfortunately, Biz Econ in UCI is not in the business school. I heard that it is really hard to change major into Paul Merage. Like only 15 people per year?
I am now more leaning toward UCSB because people said that the school have really good job network and that I would be able to take the CPA test when I graduate?
I kinda need some advice… help!!