Thanks for the sanity check. At first I thought it was just a good synergy between the K712 and my Soloist but it appears that may not be the case. Though I do still think the Soloist has a good synergy with it. Others have reported the same synergy with other 700 series headphones so it doesn't surprise me. I actually had to use parametric EQ to tone down the 2khz and around 10khz by about 2-3db. I remember preferring my AD2000X to the Annies slightly but I don't think that would be the case with the K712. And I got mine for $385 so for the money it's really awesome.
EDIT FOR CLARIFICATION: I definitely think the highs are probably the biggest weakness of the K712. They have a slight tinge of artificiality. This could be in part the Modi dac though. And for proper perspective, my previous headphone was the HD800 so of course I'm used to very good quality highs.
I don't find the Modi bright or treble emphasized at all. No more than the ODAC.
Yesterday I was trying the treble happy T90 and it actually made it sound smoother than with my new DAC
Not by much really though.
The T90 was the first headphone where I could probably tell apart some differences in my DACs. ODAC, Modi and Micro DAC sound pretty much identical in sound. I believe they're all basically transparent.
The CS4398 in the Micro DAC seems the most detailed and revealing of all of them though. It's slightly harder to pick out the lower quality tracks with the Modi compared to the Micro DAC. I love the Modi though and sounds always smooth to me.
Sometimes it sounds a little forgiving too (like the ODAC).