I agree with your comments about the AK120. It's a super little device (and so it should be for the price) although I do find its sound signature to be somewhat leaner than the DX100 and HM-801. The AK120 is given more authority when partnered with the Meier Quickstep (a very nice little amp) and I'm hoping Hugo will improve upon that combination noticeably. AK120 + UM Miracle does make a brilliant on-the-move combination, however; very small!
Really excited about the Hugo. I just can't wait!