Install 10.1.2.0.2 then apply 10.1.2.3 patch.
If you are planning to develop new applications or reports, maybe you should consider APEX (Application Express). APEX is supported by Oracle and is a modern development tool which is used now by thousands of organizations around the world.
Have a look at this white paper from David Peake, Oracle product manager for APEX. He published this EBS-APEX white paper in collaboration with George Buzsaki, from the Oracle E-Business Suite Architecture team.