I've bee using the evo for a couple of weeks. One of the reasons I got it was to use the AES/EBU with my dac. Unfortunately, my dac cannot lock onto the evo AES/EBU signal, though the rca spdif is not a problem. This issue was reported last summer when a limited release of evo's were distributed. I assumed it would have been solved with the October release of evo's here in the US. Apparently not.
On the other hand, using the spdif connection is a great step up from the original hiface, like lifting a veil on all frequencies. I'm using a 9v 2200mah battery pack, and that really is an improvement over the wall wart that it came with. But I'm thinking I might send it back and wait for the m2tech "Young DAC" to come out ("cheap" octo 32/352 listening?).....or maybe I'll hold onto the evo and save other nickles and dimes for the 32/384 dac we've all heard about.
But then, given financial limits, I'd be saving for a much loooonger time...... Decisions, decisions.......on the other hand, I'm so very pleased with my current sound I can't believe I want "More"! Should I be screaming HELP or are these perseverations normal with this "addiction"....
If I was to stick with the interface instead of the dac I would probably get the JKenny MK2. Here's a decent review comparing it to the Evo:
http://www.enjoythemusic.com/magazine/equipment/1110/m2tech_hiface_evo_dac.htm