Advice Needed

I have an oracle pl/sql,forms,reports with unix background of more than 4 years.

I want to expand my skill set towards other technologies.

The options towards me are Oracle DBA, Oracle AS and Java/J2EE, Oracle Apps

In the comming year i want learn a specific technology that gives me the greatest milage to my career.
If possible i would also like to take certification exams too to prove my capability.

I would like to know which technology i should learn.

I have seen job openings that require literally all technologies that interact with Oracle.
LIke Oracle/Unix, Oracle-Developer/DBA, Oracle- DBA/Application Server, Oracle-Java/J2EE, Oracle Developer/Oracle Apps

All technologies have their own merits.
According to me the one that makes the most of the top jobs in the market is Oracle-Java/J2EE
Oracle Apps is the one that has the biggest paying capacity and also has considerable jobs but i would not like to shift
to it now since i want to jump into the "fusion-band wagon" in 2008 when fusion is released.
Jobs that require deep understanding of Oracle at team-lead require Oracle Developer/DBA
Oracle Developer/AS jobs are very few but picking up. Mostly used for Oracle Apps world nowhere else.

Which direction should i take?