@tweak1 @palasr Yes the Hattor is very interesting. Passive and gain stage., I am very seriously considering this as well as the Denafrips Athena and Holo Serene. The Athena really excites me after reading more into it. Its a buffer with unity gain. The bummer is I'm all single ended (although my DAC is a $100 Topping so getting the same one with XLR is not a huge deal as I don't listen hard to it, its for TV and Movies).
I am probably not going the tube route as I have too much gain so a buffer stage and/or unity gain seems the way to go.