We used a WordPress installation with a $8 theme. That made it look pretty decent while I could focus on building the app. Since then we haven't found a reason

We used a WordPress installation with a $8 theme. That made it look pretty decent while I could focus on building the app. Since then we haven't found a reason to move away from WordPress. It's been fairly easy finding affordable WordPress developers whenever we want to do a big redesign. And allows us to focus on our actual product instead of wasting time building a hacked-together CMS.