Um... building your own case is just up to you. Many people buy cheap ass cases and mod them into something beautiful, some start from scratch and some put a PC into something it wouldnt regularly be in. It all depends on what you want to do...
I couldn't agree more. If you really want to have fun modding something. Buy something plain and turn it into something streamline.
Moddin' is a lot of fun but ,if not planned, it can sometimes turn into nightmare.