i personally love my nh D-14 tho granted not all memory fits under it and they didn't really solve the problem with the d15 now more memory fits under it but it's even wider than before which on some mobo layouts (like mine) makes it impossible to mount 
Case: Nanoxia Deep Silence 6 (Black) | MB: Msi X99A Gaming 9 | CPU: i7 5960x
CPU Cooling(temp): Corsair 110i Gtx | PSU: Evga Supernova 1000w | GPU: Gigabyte G1 Gaming 980ti 6gb | RAM: 16gb Ripjaws 4 3200mhz | Screen: Asus MG279Q / LG 23" Ips