Here's an update from me. I stopped using my original case with my backup PC close to a year ago. Upgraded to a Cooler Master Elite 430, and used that for 6 months or so, then went case-less for around 4-6 months. The Elite 430 just didn't have enough airflow to cool the components when I was benching, and had some issues with not being able to fit fans (hitting my RAM and CPU heatsink), nice case otherwise if you can get your components to fit in it.
Just upgraded the socket 939 benching rig to a HAF 922 this week, hopefully this one is sufficient and lasts a long time. This case is huge, and built like a tank, actually had trouble fitting it on my desk. Only downside so far is that one of the stock fans is making an annoying buzzing noise, might have to replace that one or lubricate it.
Upgraded the Cooler Master Elite 430 I was using for my main PC to a 690 II Advanced after about two years. Think I'll keep this one around longer, as it is much quieter and cooler-running than the Elite 430 was, probably mostly because the 140mm fans I used are much quieter than the 120mm ones I was using with the 430. This thing fits a lot of fans too, I've got five intake and three exhaust fans on it right now, plus the CPU, GPU, PSU, and chipset fans.