How to get the most out of a Metrum Octave Mk II?

I recently bought a Metrum Octave Mk II. I have had it for a couple of months now and I am very excited at how good digital audio reproduction has gotten in my home. My system is comprised of a set of Zu Audio Essence speakers, they have the new upgraded drivers, and I also use a Zu Mini-Method subwoofer to further boost the bass in my system. I power my Essences with a pair of Manley Labs 300b Neo-Retro SE/PP amplifiers running single ended. I use a Manley Shrimp preamp. My transport is a 2012 Mac Mini, and I process my audio files using Pure Music. I have some Hi-Rez files, but most of my collection is Apple Lossless. I have also ordered the iFi iUSB filter, with the two pronged Gemini cable, in order to isolate my DAC from dirty computer power. I am wondering what other Metrum owners are doing in order to get the best sound possible from their setups.

Thanks in advance,

Ivan