Need an external, USB DAC that has variable control over its balanced XLR/TRS outputs for use with powered monitors. I'd go with a simple mic/interface. But I don't have any intention of recording. And I figure I might as well go with a dedicated DAC then. Looking at: Cambridge DacMagic Plus Matrix Mini-i Pro Parasound Zdac V2 Emotiva Stealth DC-1 Any experience?