Career in SAP BI with SD module.

Dear Friends,

I am an SAP SD Consultant and want to choose another module for my learning in future. I am interested in SAP BI. But need to know that whether SD and BI makes a good combination or not. And hows is the market for SAP SD+BI consultants.

Besides in few threads, I saw to understand BI, ABAP knowledge is must. If it is true, then do I need to go with ABAP first or not.

Kindly share your thoughts and experiences, I need your guidance.

Regards:

Abhishek