Java Development: Eclipse or IntelliJ IDEA?

Java_Good_COBOL_Bad asks: "For Java development, would most people recommend using Eclipse or IntelliJ IDEA? I am currently using Eclipse and it took a long time to get the environment set up. I understand that Eclipse is a framework that can be used for many things, not just Java development, but all I really need is an IDE for Java. So, I wonder if Eclipse is more complex than I need. I have never used IDEA before. Is it more straight-forward? Has anybody here migrated from Eclipse to IDEA? How steep was the learning curve?"