I got myself an SGT 10.1 some time ago and I put some music onto it to check how it works as a music player. To be honest I was disappointed. It does not seem that it is a good source - not compared to my Sony X Series.
At home I have a DACPort, but I will not be there until November to check if it works.
It would be great, if all SGT 10.1 owners could try their DACs with their DACs and report the results here so we know what works and what does not work.
P.S. You need to have the USB adapter to do what I am talking about.