Lian Li PC-A12 Case
 

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.

http://www.3dgameman.com/content/view/8515/103/