Hi mojave,
no, I'm Marco Benedetti and I'm the one with the bow tie in the photo in the first message,
but my friend Marco Cicogna (the one in your photo) was at this Nagra presentation, too: Cicogna took care of the music selection, I presented the hardware.
About your question, IMHO 44.1 converted in DSD plays slightly better then upsampled at 352.8 kHz (otherwise I'd have no reason to request this feature
).
I have to say at the beginning I was really surprised, as converting in DSD we have one more step before reproduction, but obviously the anti-alias filter makes bigger damages with 44.1 files. (Again: this is why I'm asking for this feature, as at higher sample rates the anti-alias filter makes much less damages, so it's better to not convert in DSD).
BTW, I knew 44.1 converted in DSD is much better since few mounts, but the DSD capable DACs I tested in this period were all cheap models, so I thought it was just a question of cheap DA converters (as you probably know, converting DSD is much simpler), but after listening to the new Nagra, which is going to cost 20K Euro (!!!), and not only me and Cicogna, but 100% of listeners, too, agreed DSD was much better...