UNRAID build log! Building my new UNRAID server with Chinese X99 dual CPU motherboard from eBay, its the ZX-DU99D4 V1.11. Two Xeon E5-2650LV3 and 64GB of Ram (both used of eBay). This will be a great base system for playing with VMs and dockers etc in UNRAID, as well as running backups.
I settled on using two CoolerMaster 92mm Hyper H412R Compact Intel/AMD CPU Coolers. Which fit fine if you off set the fans a little.