Hi Sharib Rana
As rightly told by Florian, I would also suggest you to check the FI module (If you have got enough finance functional experience).
If its are planning a mere jump from one technology to other, I would suggest you to look for BO tools, BPC, Hybris (Java must) and so on.
By the way, what made you to close the boundaries within CRM and SD?
BR
Prabhith