OCC checked out the Cooler Master MasterBox NR400 & NR600 Cases
A quote from the article:
The NR400 and NR600 are not flashy cases. They don't have to be. What they bring to the table are utility and functionality. No matter how good a case may look, it has to have decent airflow, and that is what these two cases have. But it doesn't stop there. You get space. You get a design that uses space intelligently. You get versatility that allows for a powerful system build.Cooler Master MasterBox NR400 & NR600 Cases Review