selecting the item from suggest list using keyboard

I am using IntelliJ Idea and really like the keyboard centric features. I have installed IdeaVim plugin which is making me more productive. However, when I use IdeaVim I am able use the navigation keys H,J,K and L but when I do something like  Command + O, I need to navigate using the arrow keys which is distracting me from my workflow. Can someone suggest an alternate.