I'm only concerned with difference in airflow/air cooling. Everything else is void in this consideration. Keep in mind: I NEVER stick with stock fans, so don't base comparison on stock fans but the case design's airflow potential itself.
So, airflow only: Between the Rosewill Challenger and various Cooler Master HAF models, how big is the airflow difference? Make sure to specify the exact HAF model you're talking about when you post, as there's plenty of them floating around.