Not sure if you decided on a case already, but I have the H440 Razer Edition. Currently, I have a total of 5 HDs (see signature for more details) and 1 SSD. Not too long ago, I was running a total of 9 HDs. With the H440, the hard disk trays can mount 2 3.5" disks (one on top and another on the bottom). The 3 120MM fans, that are mounted in the front, provide plenty of air to keep the drives cool. Also, I'd keep an ambient temperature of 72 degrees. The disk temperatures rarely exceed 32C-34C. Hopefully this helps.