Update - After a week with the DM+, I am sending it back today. I'm not even sure if I let it burn in long enough, but I just got the sense that I wasn't going to be 100% happy with it. I thought it was a bit bright at the top and I noticed too much sibilance (sp?) for my liking. Perhaps this would go away with further use, and perhaps it's my system, but I just ordered a Wadia 121, so we'll soon find out!
[By the way, it was hooked up in the following arrangement:
MacBook running Audirvana -> Pangea Pure Silver USB Cable -> Dacmagic+ -> Kimber Kable Hero XLR cables -> Rotel RB-991 power amp -> Hovland Ninelines speaker cables -> Meadowlark Kestrel Hotrods] Also tried it with my Sennheiser HD-600s plugged directly into the headphone jack.
Maybe I'm expecting too much, but I didn't think it sounded noticeably better than my tiny portable Dacport plugged into a preamp with a mini-RCA adapter.