Funny that the T+A amps that would go with this DAC run the Purifi modules.. I bought the buckeye amps first.  Very happy with the sound of this system.  Subs run stereo pre-out (RCA) from the T+A and balanced to the Buckeye monoblocks, via Morrow cable (only 1 traditional cable, so spent a bit on it).  Mac Mini is both streamer and DSP, USB into the T+A DAC.  The Buckeyes have plenty of oomp combined with the 95+db/1w Tektons makes this a fun system. The Tekton Impact monitors were first, loved them - great midrange/treble (vs. My MLogan and Magnepans and B&W's) but midbass-bass needed more. Upgraded to these custom half-Ulf's (the full size would be too tall for my room, our basement).    The other gear (Marantz, Buttkicker, 3 channel Buckeye) are for the HT chain. But with BACCH I find myself doing a lot more 2 channel listening.