I ended up returning it thanks to Gary's generous return policy. No complaints about the DAC in general, it just didn't work in my setup. My amp is a little sweet on top to begin with and the BP sweetness pushed it over the edge.
I'm starting to feel Dacs are a little overrated in my setup, or I just really like the sound of the Fostex. I have a Directstream dac in house now and really the Fostex is just as resolving and smooth. To be honest I experienced a much larger jump in sound quality moving from PC to SOTM renderer than I have with any DAC. Ymmv