I think it's interesting that the OP committed to hardware without knowing what software he wanted to run on it. I don't mean that in a critical way - just that my personality would never allow such a leap of faith.
I will just add that I do not feel that Roon sound is inferior. Rather than no one has set up Roon as they recommend, in order to do a proper test, since the configuration of other systems to compare would either be apples to oranges or require a lot of duplicate gear.