I've been using Audivrana for probably 18 months now and I am a fan. The current version is 1.5.12. If you have not engaged Integer Mode I would do so. Some of the DSP processing is quite nice but the wide variability of adjustment can be quite confusing and maybe even intimidating. I have only used it in integrated with iTunes though some profess a preference in using it stand alone. If you are not in a big hurry to add this you may want to wait. Audivrana 2.0 is on the horizon. Like JRiver Media Center, Audivrana 2.0 will be a complete replacement for iTunes offering both playback and data management. Though I don't know for certain I am assuming this will be offered as a completely new product and not a free upgrade if you own the 1.5 version.
(2) Lacie Quadra2 HDD>(2) Cardas Clear USB Cables>Mac Mini (AIFF-iTunes-Pure Music)>Cardas Clear USB cable>Bel Canto DAC 1.5>Cardas Clear Light XLR interconnects>Bel Canto 500S amp>Cardas Clear Sky Speaker cables>Dynaudio Chorus 220 MKII speakers