well when it comes to cases heres mine

But it all depends on what on what you intend to run in the case CPU/GPU's and do you overclock or plan to.
Th secret with cases is good airflow which is done by powerful fans or well planed and tidy case with all leads tide back to allow the air to flow easy then you can get good cooling with less powerful fans which means less noise
heres a pic of my last case

which I had a wolfdale at 4.5GHz with very little noise
so some idea of what you run or plan to run in it would be of great help.
Fans can be tricky to buy airflow/noise/autocontrol/bios control all need to be considered carefully