If J2EE is your prime usage, I'd try both Netbeans 3.6 (www.netbeans.org) and Eclipse with Lomboz, and then make your choice. I use Eclipse but I'm not a huge fan of Lomboz (that said, I haven't taken much time to learn how to use it). Netbeans has much better "out of the box" J2EE support (Eclipse has no built-in
JSP or XML syntax highlighting for example), but I'd say Eclipse can be brought up-to-par with enough plugins and work
That said, I find Eclipse a much better IDE over all. LOL this is going to turn into an IDE debate...scroll down and find the most recent post with 20+ replies and you'll find all the info you never needed ;-).
If this is a work project, consider downloading a trial version of IntellilJ IDEA and maybe getting your boss to buy it for you.
Anyway, my $0.02.
Cheers,
--Tim