I am looking at updating my computer.

Something like an I7, Asus board, 6-8 GB of RAM and 1.5TB HDD. IDK about graphics card yet.

This is the case I am running, my CPU right now is sitting at 29 degrees C
Newegg.com - XCLIO Windtunnel Fully Black Finish 1.0 mm SECC Chassis ATX Full Tower Computer Case

Also, I would recommend Newegg.com and get a motherboard processor bundle, makes it easier.