IntelliJ all the way.
It took me a little while to transition to it from Eclipse, but now that I've done it, I don't think I could come back.
And from what I've seen at many high-profile Java Conferences, IntelliJ seems to be the crowd's favorite.
If your laptop supports it, you could also go for Samsung's new SM951, got one myself for 99 pounds on Amazon. Relatively cheap for amazing performance.
http://www.amazon.co.uk/Samsung-SM951-128GB-Solid-MZHPV128HDGM-00000/dp/B00VELD5D8