I don't bother hunting for plug-ins much either. Personally, I use MyEclipse on my Windows box at work, and this is excellent: Eclipse, plus reams of extras covering
J2EE development (
JSP editors, XML editors, UML stuff, all sorts), for $30 a year. MyEclipse is also available for the Mac, but I don't have any experience of it on mine -- I tend to just use SubEthaEdit, Eclipse and Xcode at home.