Hey , 

For MBA point of view both BBA and BSM are good choices. However if you see the wider picture doing BBA before MBA is much more apt as the subjects are almost similar and it also helps you in MBA because you already have a picture or a gist of all the core subjects in BBA .

Dear

If you have aim for MBA then I would recommend Economics Hons through that you can diversify your knowledge and expertise . Economics Hons will help you to understand the market concept, future policy planning , analytical tools to understand the data.
Then in MBA you can go for Finance International business, Business analyst or Marketing for better opportunities.

All the best