This might sound heretical, but I find that current Eclipse 3.6 for Javascript is not bad at all. http://www.eclipse.org/downloads/packages/eclipse-ide-javasc...

Since hard drive space is cheap, I have different Eclipse installations for each language I use. This seems to cut down on plugin hell and slowdowns that people often complain about.

I can't comment on how good Eclipse is actually for web development, but for embedded Javascript scripting it works splendidly. Most precisely, it lets me zoom in and out of abstractions in a large project with multiple files with ease.

Does it have properties and method autocomplete?

JetBrains WebStorm. While not really up to level of some of the better IDEs for other languages, it's probably the best JavaScript IDE currently available.

I've used both vim and Visual Studio. The latter was surprisingly good, providing reasonable code-completion.

(disclaimer: I currently work at MSFT, but am not anywhere near the VS team).