If I can't find any aluminum case and good/easy to use fan filters, I might have to go with a case that comes with fan filters.. such as the Corsair or Antec options.
Thanks for the input!
Note: Currently I have a HAF 932 and although I like it, I wish it had fan filters and was maybe half the weight! Since I don't need all the room it offers, I think I can go for a slightly smaller case.
Thanks for the fan filter input. I am going to keep using my current case with my current computer. I am building a completely new computer though. I need to keep the old computer intact so I can LAN! haha.