If you want to be a CAO (Chief Accounting Officer), the better school helps. Not sure USC / UCLA are it, but a top 50 accounting school will help get you in and up the ranks in a firm.
I have worked with (not for) the Big 4 for the past 20 years, and had an offer to be an Android (Arthur Andersen), but Public is not where I live, and those guys are all desperately selling to survive - hearing more about negative balances in those partner accounts.
You have some additional decisions, like Audit vs Tax, or Technology, and whether you are willing to do 3-4 years of slavery to the firm (80+ hours a week in season), then moving to the Corporate world of drudgery for 10 years or so to get a "C" level position in the Fortune 5000. Then start hopping UP every 3 years or so.
It is a long way to the top if you want to rock and roll, but, a JD on top of the Accounting degree wouldn't hurt, especially for the (multinational) competition you will be facing in 20 years.
Just being a CPA won't cut it if you are aiming that high. Harvard, Stanford, UChicago, ITT, UTexas, U ILL Urbana and London School of Econ are training the folks that will be manning the top slots in the Fortune 500. It is just a numbers game.