There are probably more opportunities in InfoSec, and demand is rising for qualified people. DBA is solid too, though, and Business Objectives is a pretty hot. I think you are in good shape either way, and it comes down more to what you like to do. If you decide to make the change to InfoSec, you might want to check out CISSP and SANS certifications if you haven't already - they are pretty much standard.
Answer
There are probably more opportunities in InfoSec, and demand is rising for qualified people. DBA is solid too, though, and Business Objectives is a pretty hot. I think you are in good shape either way, and it comes down more to what you like to do. If you decide to make the change to InfoSec, you might want to check out CISSP and SANS certifications if you haven't already - they are pretty much standard.