We have seen many cool Raspberry Pi cases in the past. The Pi Borg is one of the best ones yet. It is designed and handcrafted for the Raspberry Pi Model B. The case makes your Raspberry Pi look more beautiful and has holes, so you can catch a glimpse of the circuits within. These holes do provide excellent ventilation for your Raspberry Pi. The slot on the side of the case lets you use a GPIO cable. Not too expensive either.