12 April 2011
With ICWA i will suggest you to do CS. It will give you an extra edge in your career. Not only this you will also get exemption in two papers of CS Exec and 2 Papers of CS Prof on completing your ICWA course.
13 April 2011
Taking additional course in turn depends upon the area you are going to specialise. If you are proposed to specialise in Indirect taxation and all better CS and LLB.
On the other hand you want to specialise in Finance, Do CFA or MBA finance.
SO the decision will depends upon the area of specialisation you want to seek.