If you are in the market for a quality mid-tower case and you are on a
budget, I would strongly recommend checking out the Lian Li PC-A12 Case. It
comes with a stylish look, it's all aluminum, has two 120mm fans, and
there's an adequate number of drive bays (4x5.25", 2x3.5" external, and
3x3.5" internal). My only real grip with this product is it doesn't have a
removable motherboard tray. Watch the video to find out more and check out
the bloopers at the end.
http://www.3dgameman.com/content/view/8515/103/