The desktop enclosure market has broken down pretty simply into three categories with only the rarest of outliers. Cases under $100 will either have good acoustics or good thermals, but never really both. Cases between $100 and $150 will typically find a balance. And if you're paying more than $150 for a case, it needs to deliver on both, full stop. The problem that sub-$100 silent cases often run into is that the measures taken to keep noise down result in substantially reduced airflow, and when you start really pushing the hardware (and thus the limits of the case's cooling), those measures actually serve to increase system noise beyond a garden variety case.