making iWork the default?

I've been using Office forever but just decided to try iWork, and it turns out I love it 100x more than Office. I'm totally going to buy it when my trial expires. Before I do, one quick question that seems kind of obvious, even though I can't find the answer anywhere - is there any way to make iWork applications the default over Office? So that when I double click on a document in the Finder, it opens in Pages as opposed to Word?