www.directron.com has all the old and new Alienware type cases.. I believe I paid $75-$80 for the Full Tower Chieftech case w/320watt PSU shipped. And these are the BIG cases with plenty of room.
Check these out:
Chieftech Dragon Full Tower (Grey)
Chieftech Dragon Full Tower (Silver)
Chieftech Dragon Full Tower (Metallic Blue)
And here's a newer cooler looking one I've never seen till now.
Chieftech Matrix Full Tower (Metallic Blue)