re: Anyone know the starting salary of a CPA?

Starting salary at a Big 4 will average around $50k, regardless of certification. It really doesn't become a factor until you're up for promotion to senior or manager even.

Where do you see your career heading once you get your JD and pass the bar? Even if you pass the CPA exams, you will still have to get 1+ year of relevant work to become licensed, depending on the state, and you'll have to have a mandatory number of continuing education credits to maintain that license each year.