I was using a lot of PHP in college, and at the time, NetBeans provided better support for PHP (code completion, etc.) over Eclipse, and I'm too used to the IDE now haha. I use it for Java, PHP, and C++ (rarely, still not that great for C++ IMO). At the end of the day, doesn't really matter. JBuilder was promising back in 2005-2006, until it became commercial. I'm not going to pay for basically an enhanced text editor.
Never heard of IntelliJ until this post. I'd try it sometime, but don't feel like installing another big IDE on my comp.
From the IntelliJ site: "The Most Intelligent Java IDE"
Does it use Artificial Neural Networks? Will it talk to me?