For something I'll be throwing in my attic I would check out the local used pc shops for any case. I'd be buying a quality PSU to throw in a server anyways so why bother spending much on a case you dont really care about or rarely even see is my opinion. My server case in the basement is a real old pc case (tall and skinny) but hey it holds my 8 hard drives so for free why not. My bedroom htpc case is an old vcr/dvd player I gutted/modded. Actually that turned out really kewl.