Thanks, you are all right, I think the step from 1070€ to 1700€ is not that large + the dual CPU Mainboard. But I catch myself by delaying the purchase since Ryzen came around.
I really hate all those embarrassing gaming-boards and don´t want to be in the gaming enthusiast´s sector, but all local resellers of serversystems just have completely no informations about prices and release dates. They all say:" We can tell you anything about Xeon and Threadrippers, but Epyc, sorry!"
I fear it might have been cool, but epyc comes too late for me. I think I will search for a completely opaque tower chassis to avoid the risk of epylpsy and ignore the nice but unused quad-sly compatibility, they are all offering :-)