Yggy is the only DAC I've heard where my heart sometimes skips a beat and I frantically spin my head around because I think someone is breaking into my apartment. It always (and let's keep it that way) ends up being a sound from the recording that I'm either hearing for the first time, or is so 3D that I think it's happening "outside" of the headphone. Really sends shivers down your spine.
Half of me wants to pocket the $1000 difference between the Gumby and Yggy, but the the potential of losing that effect has kept me from pulling the trigger on the Gumby. If the Gumby can replicate that, we've got something really interesting on our hands..