Mac for Java development

I've been stuck in the world of Windows as my desktop development environment for my entire professional career thus far (11+ years).

In the last couple of companies that I have worked at several of the developers have been successfully using a Mac for their day to day development.

It seems to be the case that "Once you go Mac, you never go back".

There are a couple of Macbook Pro laptops sitting around unused at my current work, so I'm wondering whether I should make the move.

Given that I seem to be spending quite a bit of time configuring *nix servers, it would make sense for me to have a unix-based operating system.