When using subclipse with Aptana Studio or Eclipse, it will complain about missing "libsvnjavahl-1". On Debian, the package libsvn-java needs to be installed. After that /usr/share/java/svn-javahl.jar needs to be added as "external jar" to the JRE in use.
EPIC should install with no trouble.
In Eclipse I am giving a try to QuantumDB Eclipse Plugin for database browsing: it can be installed easily from the Aptana plugin manager.
Eclipse is a pain when working on remote files (even with ssfs) if the link is not lightning fast, so other editors I use are Komodo Edit (kind of an unofficial standard at work), Emacs (at home, always come back to it after exploring alternatives), or Kate.