www.enlightcorp.com
I picked up an EN-8950, and it's about the biggest case (other than 8U configs) that I've seen. The case will be featured in my worklog, however, for any of you looking for a LFF/Rackmount case, check out Enlight. They have sturdy cases, and reasonable prices for what you get.
To test my EN-8950, I tok off all the panels and stood on the case skeleton. No movement. I then jumed up and down, slid off the case and cracked my head. No antislip technology added to their cases, so be careful when fooling with a new case.