If you want a "LOT" of room, look for a full tower case.
They have a ton of room to work in, great airflow. As always, a few cons though, big and heavy. My back sure complains when I move my 1200 around. Pricey too.
Antec 1200 -
http://www.newegg.com/Product/Produc...82E16811129043
Cooler Master Cosmos, I considered one of these before getting the 1200 -
http://www.newegg.com/Product/Produc...82E16811119150
Cooler Master Stacker 830 Evo, another fine offering from CM -
http://www.newegg.com/Product/Produc...82E16811119122
ThermalTake Spedo Advance -
http://www.newegg.com/Product/Produc...82E16811133072
Also look at the Armor series from Thermaltake, there are a bunch of them, here's one -
http://www.newegg.com/Product/Produc...82E16811133056