Granted, measurements are not always indicative of final sound quality but out of curiousity I compared the Stereophile Measurements of the CEntrance DACport (June 2010 issue) to another USB-only DAC, the Ayre QB-9;
Correct me if I'm wrong but after comparing their respective "Measurements" sections, it appears to my untrained eye that the DACport in most ways measured as well and more frequently superior to the QB-9???
At $399 that CEntrance DACport IS quite the bargain! I just may have to pick one up ...