the lightest mid tower atx case?

Buy cheap! My dealer sells generic aluminum cases with plastic front panel that weigh around 5 lbs. You know those crappy steel cases that weigh like 8 to 10 lbs because they're so thin they bend if you breath on them? The same companies are now making aluminum cases out of equally thin aluminum that might just collapse if you fart near them.

<font color=blue>Only a place as big as the internet could be home to a hero as big as Crashman!</font color=blue>
<font color=red>Only a place as big as the internet could be home to an ego as large as Crashman's!</font color=red>

I rapped my knuckled on the side of one to see how thin it was by sound...and left dents. Previous post in jest, this post is actually true.

<font color=blue>Only a place as big as the internet could be home to a hero as big as Crashman!</font color=blue>
<font color=red>Only a place as big as the internet could be home to an ego as large as Crashman's!</font color=red>

so.. the aluminum ones like lian lie or kingwin aren't that light? but i want one with good airflow too