Where I did like the freaky look of that case, I really don't have a burning desire to go out and get one.
Besides, my HAF-X case has those same butt holes in the back for "water cooling". And I actually did use them. The rear fan placement can take a 120mm or a 140mm fan. It comes with a 140mm fan by default. So, I removed the rear fan and installed a EKWB FLT 120 pump/res combo to the outside of the rear fan mount. It uses the 120mm fan mounting holes. Then installed a Phanteks Glacier D140 distro plate to the inside of the rear fan mount. It uses the 140mm fan mounting holes. It's said that the HAF-X case can take a 240mm radiator on the top. But you can fit a 360mm radiator, no problem. Only you lose access to the top two 5 1/4 drive bays.