Something I enjoy when using a well built case is the ease of installing my components. CDI chose the Q500 from Inwin very wisely. This case comes made from 1.0mm sheet metal, rounded edges on all corners and removable trays and cages. With these very minute additions in the creation of this case, Inwin comes out on top with its usability. This isn't the newest case on the block, there are others but this one has stood the test of time and proved it got what it takes to survive.
First thing I usually look for in a new case before installation is to see if I can devise a game plan. This involves checking for removable cages and other areas that can be accessible some other way. The most convenient feature of many cases is the removable 3.5" cage. The Q500 comes with a huge 3.5" removable cage. Now if only the 5.25" bays could do the same, this would be the perfect case, but I have yet to see one really in the mainstream.
Also of interest is the removable motherboard tray. I personally don't care for it too much, but some people do prefer to have the ability to slide their board in and out without much work. You can do so by removing the few screws from the back of the case near the I/O panel (picture 3 above) and pulling the tray out.
Our complete case came with a hefty Enermax 365W power supply. It has the extra power plugs so this is P4 ready. You can opt to have just a regular 300W, but for a few bucks more you can add this monstrosity into the mix. The main strand of wires that make up the ATX connector is wrapped in a flexible mesh material. Nice touch to keep everything in a single strand. I would have probably zip tied the whole thing if that was not provided. But my method would look ghetto in some aspects : )
A higher rated power supply is definitely needed to safely run all these fans and accessories. If you do the math, the fans don't necessarily add up to exceed the maximum that these power supplies may support. Although this is true, add in a few more components like hard drives and the like and you're pushing it up to the limit. Might as well jump in and get a power supply large enough that can support the system and then some. Always a good idea to have more, than to have less. You'll never know when you really need it!