Whether you are building your own computer or working with a pro to do it for you, you should take your time to find the best case for your needs. The Corsair Air 740 is an awesome PC case with dual chambers to keep your processor and graphics card cool. The Air 740 has enough space for high-end water cooling setups.
You will have enough space for up to 8 x 120mm or 7 x 140mm fans, a 240mm or 280mm top radiator, or a 360mm radiator. Your power supply, SSD, and other drives will sit in a different chamber.