Having used, auditioned and built multiple streamers and Roon cores over the last few years, I have to comprehensively disagree with the sneering negativity I’ve seen from some towards the Mac Mini: my experience is that it’s a solid, well designed and high quality source/streamer. My empirical playout chain (keeping Ockham’s Razor in mind) has an M1 Mini powered via an Isotek Sigmas, and feeding my DAC over Ethernet, through an Etherregen switch. Both the power supply and the network connection do make a difference though - I recently had to temporarily move the Mini from the hifi rack to my server cabinet, where the power comes from a basic UPS, and that has definitely degraded the SQ.
I’ve yet to find any streamer whose imposition between the Mac & DAC improves things, but happy to continue, in the spirit of sceptical curiosity.
The only scenario where I’d consider an alternative architecture would be if I were still using HQPlayer downstream of Roon: HQP is better optimised for X64 instruction sets than for ARM-based systems. As it is, HQP makes no difference to the current DAC.

