Gradle/Idea integration for scala/java development

I’m looking for a robust gradle/intellij idea integration for mixed scala/java development.

afaik, there are two approaches for integration: gradle idea plugin and idea gradle plugin. Are they mutually exclusive? Which one is preferable? Do we have any other options?

I’m seeking for the most potentially hassle-free solution that gives a full flexibility of gradle builds with all features of IDE (editing, debugging, etc).

Anyone’s experience is welcome.

Currently, I’d recommend to use Gradle’s IDEA plugin. With IDEA 13, this may change.