Originally Posted by PowerK
I am currently deadlocked between Phanteks Evolv ATX and Corsair 750D. (Fractal Design Define S was on the list but I found out that E-ATX motherboard wouln't fit in it).
Mail order is a big issue. I guarantee that if you had an Evolv ATX and 750D in front of you, this wouldn't even be a question. The quality of the Evolv is worlds better, and it is readily evident in it's appearance, as well as how the components actually fit into the case. This decision should be a no-brainer (again, if you could see them first hand), it is a bit like deciding between a Ferarri and a Honda Civic that has been plastered with yellow Nuespeed stickers.
In terms of airflow, while the Evolv ATX is only average, the 750D is certainly not better and is likely actually worse - unless you get the airflow edition and change the fans, which puts it on par with the Evolv. The airflow woes of the 750D are well documented and well known, while most of the Evolv's supposed airflow issues come from supposition of those who have never used one. Were you to dig through the last few hundred pages of this thread you would find that most are having satisfactory airflow, and most of the airflow talk is tweaks to improve it.
As for the SLI, one of the nice things about the 1080 is that two of them only produce about as much heat as a single OC 980 Ti, so that will help.
A huge help would be going with a Swiftech H240-X2 (or even H220-X2) rather than a CLC. Much better performance without the huge reliance on ridiculously loud fans. The Swiftech also happens to look a whole lot better in the case - another Ferarri vs Honda Civic....