So I just ordered an EVGA GTX 1080 FTW Hybrid, should be here tomorrow! It was almost 100$ more expensive than the cheapest Gigabyte Windforce 3X 1080 but the warranty and quality was worth adding some more money IMO.
It should be awesome in my closed P400 case because the open-air, hot 980Ti really made an oven out of it under load. I'll mount the rad as exhaust in the back of the case.