As Kengkaj said, it depends.
However, if you in this moment don't have any project fr particular technology, I would recommend to take SCBCD.
Reasons:
1. Mobile
Java market is very weak (IMHO). Least popular forum at JavaRanch certification section.
2. SCBCD 5 includes JPA. So, it will help you to work with Hibernate framework later.
regards,
MZ