tomcat ejb enabled

[unplug]

HI all,
  I would like to config tomcat to ejb enabled.  Now I have the follow
choice in my mind.
1. apache + tomcat + jonas
2. apache + tomcat + enhydra
3. others
  Does anyone here use the configurations above??  Which one has better
performace and easy to install/config?  Or other suggestions?

Rgds,
unplug