@Surfski thank you for the impressions, especially those with the HD800. I am seriously thinking about buying a pair of HD800 (again!) and I'll need a relatively compact device for that. Seems like the Hugo would be an excellent choice.
Scenario 2 - Same as above but with HD800. I have struggled to come up with a DAC / amp combination that really sings with this headphone. I was really surprised how well Hugo supported the HD800. All the openness you would expect, neutral, and credible bass. Really nice...particularly for a mobile solution. Again, you can pay a lot more for a high end DAC / Amp combination and get more...but you will not be listening to this in business class either.