Mostly what you'd look for is good ventilation and fans. Other things can be nice too like tool-free expansion slots and drive bays, a cable management system (or get some zip-ties) and plenty of space inside.

NZXT, Apevia, Cooler Master, and of course Antec all make some decent cases. The NZXT Gamma is an example of a decent case for about $35. You'd want to add more fans to it and it's ugly as hell but it has plenty of places for air to get in and out.

View the original article here