So in fulfilling my promise to report back, I have the K50 (so not more Mac Mini) which is proving to be a huge improvement. I even had a MSB Renderer V2 in here and A/B them and it was no contest. K50 by a large margin, the compounding clocks just win out over the MSB renderer, which is as it should be when one considers the cost difference. My Switch (HNE LABs) is installed and that made such an impact I ordered a second to layer them. This was one of my better upgrades to my front end, the switch and the K50.
What I have not done yet is convince myself the Premier DAC should be my next step. I've bought new speakers (Wilsons) so I might wait until after I break them in. The Discrete with two power supplies is really fantastic, but my curiousity for the Premier is unrelenting, as I feel that is where I should have jumped in.