I'm one of the project owners on the GoClipse project. I do a lot of polyglot development (Java, Javascript, C, Go, & a little Python). I've used and liked vim, Sublime w/ GoSublime, and GoClipse. All with gocode. I have a hard time escaping Eclipse, in general, because of my skill profile. It kind of unifies the experience.

http://code.google.com/p/goclipse/ https://github.com/nsf/gocode