If you are shopping for a new PC chassis for someone on your holiday list this Christmas season, Thermaltake has a great chassis with lots of internal room called the Armor. The Armor will work with ATX, Extended ATX and BTX mainboards.

If you are into overclocking, the Thermaltake Armor is an excellent choice with plenty of room for large water cooling components and pre-drilled holes on the bottom of the chassis for securing your water pump.
Review excerpt: "Cooling is very good with the Armor as well thanks to the huge 25cm fan on the clear side panel and the mesh drive bay covers and the top is 62% covered in mesh that allows heat out. You can relocate the front controls for power and reset anywhere you like in the 11 available bays which is a cool feature. In addition to the 25cm side fine there are also 12cm fans in the front and rear as well as a 9cm fan in the top." Read the full review here.