You're right, I don't have the measurements handy. I was trusting posts by known engineers (eg, jcx, gregorio, etc) on head-fi's sound science forum. I assume they have the data since it is their job to know, but I didn't bother asking them for it. And I sometimes get confused when talking about MB vs. D-S, because technically MB is a kind of D-S dac (as opposed to R2R).
Amir's rig is still working fine. It still measures non-Schiit dacs as doing what they're supposed to and Schiit dacs as being especially susceptible to line noise/jitter (he's now measured the modi 2, bimby, and yggy). He just posted measurements of the Topping D50 and Bryston BDA-2, both of which did very well. Comparative measurements look roughly inline with Archimago's for the dragonfly and idea.
But I'm getting off-track here. Let's look at John Atkinson's yggy measurements (I can't get to SBAF at the moment, and I trust Atkinson knows what he's doing). I know it's not MB, but let us just assume for the moment that the yggy measures at least as good as the mimby. Both THD and IMD are -90 to -100dBFS. Noise floor is -130 to -135dBFS. Jitter rejection is disappointing, though not bad by any means. The $250 Topping D50 nominally has THD -106dB across the audible band. In the past, they have backed this up with results from their audio analyzer, so I assume this will continue once it's actually released. In the meantime, Amir has measurements that support this claim. His measurements also show IMD is -99 to -104dB for input signals -10dBFS or louder. Nominal SNR is 122dB, though it looks a bit better in Amir's measurements (comparable to the yggy). Jitter rejection is excellent. Just based off of this, and assuming that the mimby only measures as good as the yggy, I would argue the D50 is probably the better value. The SMSL M8A is probably in the same ballpark for somewhat less coin (Amir has one on order from Massdrop, so I guess we'll see).
As for picking up a purifier, I don't see the point. $50-$100 on a <$250 dac kind of kills the deal, no? Especially when it's so easy to find dacs that don't need them.