I should add that all three, on good sounding CDs, were quite excellent. On bad material, well, GIGO. The MSB was probably the most dynamic. The Schiit and the Theta had a strong family resemblance, a more laid-back presentation, and therefore maybe friendlier to poor material, with the Theta having a bit more heft than the Schiit. Then again it was $4000+ when it was new, and the Schiit is $599, and power supply and analog stage design have changed little in the interim.
I expect that a better source with truly low jitter could have changed the outcome - and made a bigger difference than choosing any of the DACs over each other. I would like to ( and will) compare the same CD through the Schiit played over USB (asynchronous, DAC clocking) and a run-of-the-mill transport (synchronous, transport clocking). I expect that will be enlightening. The Schiit alas, is not mine so it takes a bit more doing.