The V281 can be a little bright too, so having a DAC thats also bright is not a good combo. I have the Oppo HA-1 which has a Sabre chipset and its not a good combo as a DAC feeding V281 at its pre-out to Pre-in on V281. If the IDSD micro is bright and harsh, it might not be a good combo. I found Schiit Yggdrasil to be a really good DAC with V281, its just perfect and V281 amplifies its output just with pure musicality Ive never heard before.
I also reviewed Hegel HD25 and HD30, being HD25 the better one for V281. THe HD30 is too crisp and sharp even though it goes deep, not harsh. HD25 is like the Schiit Yggdrasil.
I do believe the other Schiit DACs will be paired with V281 just fine too.
Mabye look for AMK chipset, which is known to be well balanced even to the deeper end of the spectrum. Sabre chipsets might be too bright.