The. Micro iDSD supports DSD playback, charges your phone (4800 mAh built in battery, why not?), more powerful, dual DAC, more features to play with but one tiny lil draw back that iF is working for a fix. That would be, the "Bit-Perfect" filter causes hisses but the minimum phase works perfectly fine thought.
Not so sure about the Centrance thought.
Otherwise, you can get another cable for the Alpha Dog that ends with 1/4 jack and then get a set of PortaTube.