Which one is better , engi +ICWA or engi + mba (from some reputed national coll) , i am a comp science undergrad from bits pilani.

I am working as corporate materials management intern in a bagla group company & i have gained a lot of interest in the business activities.I want to pursue higher education in the related fields and not in engi,so plz help me as to which option is better,if i do an mba it will be frm some top inst.