I too prefer the optical from PRO USB module over the DAC SFP+ cable on my MSB Select II. What I haven't tried yet is replacing the optical between the S II DAC and the DD with an SFP+ cable.Steve, I'm in a strange situation where my system isn't in the house I spend most time at (long story), so I've had to get used to bursts of hifi. I will eventually move to be with it full time. But for now the advantages of the other place I live (see profile photo!) make up for it, and I console myself that I have 2 related hobbies, hifi and listening to music - and I do a lot of listening (phone + Qobuz + Apple mini HomePods) and new music discovery when I'm away from my HiFi.
I'm sure the XDMI analog IO board will perform at an absolute very high level due to the advantages of Olympus, Taiko batteries, and native XDMI.
How many Dacs without the Taiko battery and XDMI advantages will 'fall by the wayside' against XMDI analog remains to be seen, but you (or at least I) have to think there must be a level at which the Dac-specific expertise of some manufacturers will come to their 'rescue' - I think Emile has posted to that effect. But he's heard his Dac, he has always been right, and so if he's saying / implying its right up there, then I'd believe him.
It will take some time to play out XDMI adoption (so I'd be happy to wait a while), but at the end of the day if the Dac manufacturers really can't (or choose not to) add any value over the current Taiko Dac or a future version / design in the Olympus IO expansion box and are behind the all-Taiko SQ curve, then I'd have no hesitation dropping them in favour of Taiko and Olympus IO w XDMI & Taiko Dac. But, I hope they will all be like Lukasz and jump all over it when they hear it.
With all that being said, I'm not sure I'm prepared to predict 'digital end-game' just yet though, Emile has many years of innovation left in him...let's wait and see, grasshopper
Personally in the medium term (like you, it sounds) I'm keeping my fingers crossed for a general purpose Taiko mini-BPS (as well as Switch and Router) so that I can maybe try one or two to replace my Dac power supply. From limited experiments I can definitely improve SQ by improving power to the MSB Powerbases (30A line vs 20A line) and shielding cables.
And finally, I also tried a fresh-out-of-the packaging $20 DAC SFP+ cable in place of MSB's optical cable connection to their ProUSB module. Whilst I currently preferred optical overall, I felt that the DAC had definite promise about it. So I'm hopeful that when I/we can ditch USB and connect to XDMI, a DAC cable will be better than the optical, too, as currently with the switch & router.
Happy listening everyone, I'm looking forward to hearing your thoughts as Olympus rolls out!
It will be interesting to see what Emile recommends with his MSB/XDMI solution