It seems like you already know what you want, don't you?
SCEA certification [still] looks impressive to those management types, so go ahead and to it.
On the other hand, SCEA part I contains ~30% questions about EJBs, so if you did SCBCD you can easily try SCEA part I as well. For both SCJP and SCBCD there are good books available, so if you got 3 years experience, it's about 3 days of preparation for each exam.