Coming from the CKM500, I so far very disappointed with the IM70. Bass is not there at all. Having fitting issues with Sony tips. Still experimenting there. What is the burn-in period on these? As I said, so far very disappointed.
I really would love a comparison of the Arcam irDAC vs. Schiit Gungnir USB2 vs. Rega DAC-R (new one).
For the Arcam I can say this: it's rare to find ANY consensus on DACs but somehow across several different audio forums I visit, Arcam has managed to garner positive bang-for-buck commentary from all of them.