Accounting at Deloitte as part of the BrightStart scheme

If i were to work at Deloitte, and this is only partly affecting my decision, this will by no mean she the deciding factor, what should i specialise in? Tax Consulting, management/strategic consultant, audit + risk advisor or financial advisory, what pays best and what gives me the most job opportunities if i wanted to leave (ie. what gives me the best chance of going into investment banking, hedge fund etc.). Also, not just starting salaries, but what about as you get higher up the ranks as well?