My only experience has been with the Ack Dack 1.2d and the 2.0. I liked my Bolder Cable modified Squeezebox better, and I didn't have to remember to turn off the DAC (which is battery powered). By the way, I'll sell you my Ack Dack 2.0 for $150 + shipping. You could try it out and sell it for more money if you didn't like it. HOWEVER, this requires an analog and not optical input, so you'd have to have an intermediary optical-to-analog converter.