Audit/tax/advisory?

I cleared the IPCE this May,securing 68%(1st attempt).
I've emailed my resumes to 3 of the Big4 with a good reference and am fairly certain of getting an interview call.
In case I am given an option regarding the Department,which one has the best scope?

P.S.-Direct Tax and Financial Management were my favourite subjects in IPCC.I have no intentions of starting a CA firm in              the future or working in one.