Hi Raj,
CS itself is a great career opportunity provider and with MBA it is better.
First you decide that where you want to reach in your life/career. If you want to go in Accounting & Finance Sector then join CA OR if you want to go in Finance & Management Area then go for ICWAI. MBA(Fin.) is very nice with both of these. Keep in mind that both courses will take 5 years to complete including training period and in ICWAI 4 subjects and training are exempt, if you qualify you CS.
CS is realted to Law & Legal area and this give you direct opportunity to sit in high level management(off-course not in intitial level), so if you are interersted in Law & Legal side then you should go for LLB, if you want some further study.
At last, if you want to join CA or ICWA then join today because this will save you time.
With best Wishes!!!
Dinesh S. Adhikari