A few suggestions
While I like the almost shiny silver finish (is it sandblasted as opposed to brushed?) I would have liked to have had the option for a black one. While on the subject of finishes, I like the DACmini engraving on the top panel but the font usage doesn't seem consistent with what I've seen elswehere. DAC is using a thinner font, I assume the same as the word mini, but on the front panel and in other literature DAC uses a bolder font which IMO looks much nicer.
I've wondered whether the implentation of a gain switch might be of benefit for those who are using more sensitive IEM's and while on the same track, the addition of a second 1/8" input would be really cool as well.
And last, I haven't put the feet on yet, the DACmini is sitting on the foam from it's packaging, I'd love to see a better implementation for them, maybe something that screws on using the same screw holes as the base?