Just to be sure you give them fair consideration, Eclipse and Netbeans have gone back and forth for a while. Eclipse used to be a good deal quicker because they didn't use Swing.
Now Netbeans has caught up (perhaps surpassed) and has a lot of momentum.
You will get more votes for Eclipse. Period. This is because it was better and more people use it--and it's just human nature to feel what you are using is the best and everyone should use it.
Because it was better does not mean it's better now. Netbeans has more languages supported and more all-around support--so it's growing faster.
Currently I use Eclipse--I've used both (and IntelliJ and TextMate and Notepad...) and I can tell you that Eclipse has exactly one feature over netbeans... Mylyn (it's been renamed, it used to be called Mylar). This thing is pretty damn cool, but few people seem to even know it exists.
So, if you don't know a bunch of keystrokes that already tie you to an editor, the up and coming is Netbeans--don't pass it up because of a bunch of Eclipse votes.
Better yet, get good with both--it can't hurt and makes me a lot more comfortable when a company requires one or another. Don't whine when they make you change.