if you are developer with say 2 -3 years experience , then I think
You should go for
SCJD i.e. developer. Now Sun has also started SCWCD ( Sun certified Web Component Developer ) . You can also go for that as you are scjp.
If you have experince of system Architect , then I feel SCJEA will be value addition to you.
You can also go to Job Discussion Forum , where you will find good discussion about the problems you have.
For SCWCD , you can go to the forum started for this certification.
I hope this can help you to certain extent.
Your Friendly Bartender
Shailesh.