I heard the Hugo today.
RWAK 120-S > SPdif > Hugo > Sennheiser HD800 with Siltech Duchess cable.
The best I have heard the HD800s driven by a portable device. The Hugo has a full size component sound, and for me betters every portable amp that I have heard the HD800 with.
I also heard the Hugo, as a DAC in a speaker set up, and again, first portable device that has scale, and am able to fully fill out the soundstage. Completely at home in a speaker set up.
Very exciting device for portable audio!
Did you compare the hugo's amp section to other amps? As in just hugo w/ hd800 vs hugo line out to another amp w/ hd800?