Meh, That's what a dremel is for.
Open a fan mount on the side panel or get a machine shop to open a hole for you. Now this also depends on what you feel like doing with the case and whether or not you actually enjoy the it. In my opinion the Raven is for showing off your beast rig and the tempest is the perfect balance between performance and looks, It's sleek yet powerful. The Raven from what I remember doesn't have very many features on the inside, personally I can't stand the fact that the bottom fans aren't replaceable except for the stock model.