AnandTech has written a guide to help holiday buyers choose the best cases, power and storage products:
In our first Holiday Buyers' Guide, we put together the core of the system; now it's time to take care of the remaining pieces. Need to know where you're going to store all those programs, movies, pictures, music, etc.? Perhaps you're more concerned with the box that all of the parts are going to call home. Maybe you're looking for a quiet, energy efficient power supply to make everything work. We'll put together the remaining pieces in this installment of our Holiday Buyers' Guide.
We still have a few other areas to look at as well, but parts one and two will provide everything you need for the large (or perhaps not so large) black box that sits on the floor. If you're worried about peripherals like speakers, keyboards, mice, or displays, we'll cover those areas and others in part three. Now let's find all of our parts a home, by looking at some computer case options.