Dave made me a BatteryBUSS powered DISCREET USB cable for some listening trials as well. Sounds really good as well with the MS-1!
This is for devices that need clean USB power like DAC's that are bus powered.
As an example, I tried my Musiland Monitor 01 Mini USB powered DAC with headphone amp. You could hear low level power supply noise with the standard USB cable from my netbook and MS-1. Put in the powered DISCREET USB cable and dead quiet playback. Not bad for a $65 async DAC!